165625510621432 has 32 divisors (see below), whose sum is σ = 310828721871600. Its totient is φ = 82737885291264.

The previous prime is 165625510621427. The next prime is 165625510621561. The reversal of 165625510621432 is 234126015526561.

It is a super-2 number, since 2×165625510621432² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37088619 + ... + 41313637.

Almost surely, 2^{165625510621432} is an apocalyptic number.

It is an amenable number.

165625510621432 is a deficient number, since it is larger than the sum of its proper divisors (145203211250168).

165625510621432 is a wasteful number, since it uses less digits than its factorization.

165625510621432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4229455 (or 4229451 counting only the distinct ones).

The product of its (nonzero) digits is 2592000, while the sum is 49.

The spelling of 165625510621432 in words is "one hundred sixty-five trillion, six hundred twenty-five billion, five hundred ten million, six hundred twenty-one thousand, four hundred thirty-two".