165564355902 has 48 divisors (see below), whose sum is σ = 372845256336. Its totient is φ = 48947324800.

The previous prime is 165564355889. The next prime is 165564355907. The reversal of 165564355902 is 209553465561.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165564355907) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2751333 + ... + 2810864.

It is an arithmetic number, because the mean of its divisors is an integer number (7767609507).

Almost surely, 2^165564355902 is an apocalyptic number.

165564355902 is an abundant number, since it is smaller than the sum of its proper divisors (207280900434).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

165564355902 is a wasteful number, since it uses less digits than its factorization.

165564355902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5562265 (or 5562254 counting only the distinct ones).

The product of its (nonzero) digits is 4860000, while the sum is 51.

The spelling of 165564355902 in words is "one hundred sixty-five billion, five hundred sixty-four million, three hundred fifty-five thousand, nine hundred two".