165251649104 has 40 divisors (see below), whose sum is σ = 338369280480. Its totient is φ = 77965200000.

The previous prime is 165251649077. The next prime is 165251649109. The reversal of 165251649104 is 401946152561.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165251649109) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1006547 + ... + 1159154.

It is an arithmetic number, because the mean of its divisors is an integer number (8459232012).

Almost surely, 2^165251649104 is an apocalyptic number.

It is an amenable number.

165251649104 is an abundant number, since it is smaller than the sum of its proper divisors (173117631376).

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

165251649104 is a wasteful number, since it uses less digits than its factorization.

165251649104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2165979 (or 2165973 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 44.

The spelling of 165251649104 in words is "one hundred sixty-five billion, two hundred fifty-one million, six hundred forty-nine thousand, one hundred four".