165445542620 has 48 divisors (see below), whose sum is σ = 347976518400. Its totient is φ = 66075294720.

The previous prime is 165445542611. The next prime is 165445542697. The reversal of 165445542620 is 26245544561.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53558036 + ... + 53561124.

It is an arithmetic number, because the mean of its divisors is an integer number (7249510800).

Almost surely, 2^165445542620 is an apocalyptic number.

165445542620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165445542620 is an abundant number, since it is smaller than the sum of its proper divisors (182530975780).

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

165445542620 is a wasteful number, since it uses less digits than its factorization.

165445542620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6398 (or 6396 counting only the distinct ones).

The product of its (nonzero) digits is 1152000, while the sum is 44.

The spelling of 165445542620 in words is "one hundred sixty-five billion, four hundred forty-five million, five hundred forty-two thousand, six hundred twenty".