165225515612 has 48 divisors (see below), whose sum is σ = 302388885120. Its totient is φ = 78913922112.

The previous prime is 165225515591. The next prime is 165225515639. The reversal of 165225515612 is 216515522561.

It is a self number, because there is not a number n which added to its sum of digits gives 165225515612.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6860063 + ... + 6884105.

It is an arithmetic number, because the mean of its divisors is an integer number (6299768440).

Almost surely, 2^165225515612 is an apocalyptic number.

It is an amenable number.

165225515612 is a deficient number, since it is larger than the sum of its proper divisors (137163369508).

165225515612 is a wasteful number, since it uses less digits than its factorization.

165225515612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24930 (or 24928 counting only the distinct ones).

The product of its digits is 180000, while the sum is 41.

The spelling of 165225515612 in words is "one hundred sixty-five billion, two hundred twenty-five million, five hundred fifteen thousand, six hundred twelve".