165143644631625 has 32 divisors (see below), whose sum is σ = 299780754189696. Its totient is φ = 80069645880000.

The previous prime is 165143644631597. The next prime is 165143644631663. The reversal of 165143644631625 is 526136446341561.

It is not a de Polignac number, because 165143644631625 - 2⁸ = 165143644631369 is a prime.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20017407346 + ... + 20017415595.

It is an arithmetic number, because the mean of its divisors is an integer number (9368148568428).

Almost surely, 2^{165143644631625} is an apocalyptic number.

165143644631625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

165143644631625 is a deficient number, since it is larger than the sum of its proper divisors (134637109558071).

165143644631625 is a wasteful number, since it uses less digits than its factorization.

165143644631625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40034822970 (or 40034822960 counting only the distinct ones).

The product of its digits is 37324800, while the sum is 57.

The spelling of 165143644631625 in words is "one hundred sixty-five trillion, one hundred forty-three billion, six hundred forty-four million, six hundred thirty-one thousand, six hundred twenty-five".