165277313057 has 16 divisors (see below), whose sum is σ = 174029799888. Its totient is φ = 156803512320.

The previous prime is 165277313051. The next prime is 165277313077. The reversal of 165277313057 is 750313772561.

It can be written as a sum of positive squares in 8 ways, for example, as 5178097681 + 160099215376 = 71959^2 + 400124^2 .

It is a cyclic number.

It is not a de Polignac number, because 165277313057 - 2¹⁰ = 165277312033 is a prime.

It is a super-2 number, since 2×165277313057² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165277313051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90998 + ... + 582095.

It is an arithmetic number, because the mean of its divisors is an integer number (10876862493).

Almost surely, 2^165277313057 is an apocalyptic number.

It is an amenable number.

165277313057 is a deficient number, since it is larger than the sum of its proper divisors (8752486831).

165277313057 is a wasteful number, since it uses less digits than its factorization.

165277313057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 673300.

The product of its (nonzero) digits is 926100, while the sum is 47.

The spelling of 165277313057 in words is "one hundred sixty-five billion, two hundred seventy-seven million, three hundred thirteen thousand, fifty-seven".