165161805826 has 16 divisors (see below), whose sum is σ = 248355694080. Its totient is φ = 82376634240.

The previous prime is 165161805737. The next prime is 165161805833. The reversal of 165161805826 is 628508161561.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 165161805826.

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, 8348935 + ... + 8368693.

It is an arithmetic number, because the mean of its divisors is an integer number (15522230880).

Almost surely, 2^165161805826 is an apocalyptic number.

165161805826 is a deficient number, since it is larger than the sum of its proper divisors (83193888254).

165161805826 is a wasteful number, since it uses less digits than its factorization.

165161805826 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29889.

The product of its (nonzero) digits is 691200, while the sum is 49.

The spelling of 165161805826 in words is "one hundred sixty-five billion, one hundred sixty-one million, eight hundred five thousand, eight hundred twenty-six".