165151801650474 has 128 divisors (see below), whose sum is σ = 389507258511360. Its totient is φ = 51758135352000.

The previous prime is 165151801650461. The next prime is 165151801650487. The reversal of 165151801650474 is 474056108151561.

165151801650474 is a `hidden beast` number, since 1 + 6 + 5 + 1 + 5 + 1 + 8 + 0 + 165 + 0 + 474 = 666.

It is an interprime number because it is at equal distance from previous prime (165151801650461) and next prime (165151801650487).

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 165151801650474.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 109179499 + ... + 110681825.

It is an arithmetic number, because the mean of its divisors is an integer number (3043025457120).

Almost surely, 2^{165151801650474} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 165151801650474, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (194753629255680).

165151801650474 is an abundant number, since it is smaller than the sum of its proper divisors (224355456860886).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

165151801650474 is a wasteful number, since it uses less digits than its factorization.

165151801650474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1503873 (or 1503867 counting only the distinct ones).

The product of its (nonzero) digits is 4032000, while the sum is 54.

The spelling of 165151801650474 in words is "one hundred sixty-five trillion, one hundred fifty-one billion, eight hundred one million, six hundred fifty thousand, four hundred seventy-four".