165526426065 has 64 divisors (see below), whose sum is σ = 355592466432. Its totient is φ = 63498643200.

The previous prime is 165526426031. The next prime is 165526426111. The reversal of 165526426065 is 560624625561.

It is not a de Polignac number, because 165526426065 - 2¹⁰ = 165526425041 is a prime.

It is a super-2 number, since 2×165526426065² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5497021 + ... + 5527050.

It is an arithmetic number, because the mean of its divisors is an integer number (5556132288).

Almost surely, 2^165526426065 is an apocalyptic number.

165526426065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

165526426065 is an abundant number, since it is smaller than the sum of its proper divisors (190066040367).

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

165526426065 is a wasteful number, since it uses less digits than its factorization.

165526426065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11024110.

The product of its (nonzero) digits is 2592000, while the sum is 48.

The spelling of 165526426065 in words is "one hundred sixty-five billion, five hundred twenty-six million, four hundred twenty-six thousand, sixty-five".