165972651004 has 24 divisors (see below), whose sum is σ = 299841526656. Its totient is φ = 80304000000.

The previous prime is 165972650993. The next prime is 165972651059. The reversal of 165972651004 is 400156279561.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2336004 + ... + 2406004.

It is an arithmetic number, because the mean of its divisors is an integer number (12493396944).

Almost surely, 2^165972651004 is an apocalyptic number.

It is an amenable number.

165972651004 is a deficient number, since it is larger than the sum of its proper divisors (133868875652).

165972651004 is a wasteful number, since it uses less digits than its factorization.

165972651004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89157 (or 89155 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 46.

The spelling of 165972651004 in words is "one hundred sixty-five billion, nine hundred seventy-two million, six hundred fifty-one thousand, four".