165425918840 has 96 divisors (see below), whose sum is σ = 466283018880. Its totient is φ = 52354568448.

The previous prime is 165425918837. The next prime is 165425918857. The reversal of 165425918840 is 48819524561.

It is a hoax number, since the sum of its digits (53) coincides with the sum of the digits of its distinct prime factors.

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 23 ways as a sum of consecutive naturals, for example, 3220712 + ... + 3271671.

It is an arithmetic number, because the mean of its divisors is an integer number (4857114780).

Almost surely, 2^165425918840 is an apocalyptic number.

165425918840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165425918840 is an abundant number, since it is smaller than the sum of its proper divisors (300857100040).

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

165425918840 is a wasteful number, since it uses less digits than its factorization.

165425918840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6492421 (or 6492410 counting only the distinct ones).

The product of its (nonzero) digits is 2764800, while the sum is 53.

The spelling of 165425918840 in words is "one hundred sixty-five billion, four hundred twenty-five million, nine hundred eighteen thousand, eight hundred forty".