164756205261 has 12 divisors (see below), whose sum is σ = 238000845888. Its totient is φ = 109828396104.

The previous prime is 164756205181. The next prime is 164756205277. The reversal of 164756205261 is 162502657461.

164756205261 is a `hidden beast` number, since 1 + 64 + 7 + 5 + 62 + 0 + 526 + 1 = 666.

It is not a de Polignac number, because 164756205261 - 2⁹ = 164756204749 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164756205961) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 640245 + ... + 859898.

It is an arithmetic number, because the mean of its divisors is an integer number (19833403824).

Almost surely, 2^164756205261 is an apocalyptic number.

It is an amenable number.

164756205261 is a deficient number, since it is larger than the sum of its proper divisors (73244640627).

164756205261 is a wasteful number, since it uses less digits than its factorization.

164756205261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1512352 (or 1512349 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 45.

The spelling of 164756205261 in words is "one hundred sixty-four billion, seven hundred fifty-six million, two hundred five thousand, two hundred sixty-one".