165623542564 has 24 divisors (see below), whose sum is σ = 305112815840. Its totient is φ = 78448932864.

The previous prime is 165623542543. The next prime is 165623542681. The reversal of 165623542564 is 465245326561.

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, 1643827 + ... + 1741669.

Almost surely, 2^165623542564 is an apocalyptic number.

It is an amenable number.

165623542564 is a deficient number, since it is larger than the sum of its proper divisors (139489273276).

165623542564 is a wasteful number, since it uses less digits than its factorization.

165623542564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120139 (or 120137 counting only the distinct ones).

The product of its digits is 5184000, while the sum is 49.

The spelling of 165623542564 in words is "one hundred sixty-five billion, six hundred twenty-three million, five hundred forty-two thousand, five hundred sixty-four".