165356453572 has 6 divisors (see below), whose sum is σ = 289373793758. Its totient is φ = 82678226784.

The previous prime is 165356453567. The next prime is 165356453573. The reversal of 165356453572 is 275354653561.

It can be written as a sum of positive squares in only one way, i.e., 164881475136 + 474978436 = 406056^2 + 21794^2 .

It is not an unprimeable number, because it can be changed into a prime (165356453573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20669556693 + ... + 20669556700.

Almost surely, 2^165356453572 is an apocalyptic number.

It is an amenable number.

165356453572 is a deficient number, since it is larger than the sum of its proper divisors (124017340186).

165356453572 is a wasteful number, since it uses less digits than its factorization.

165356453572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41339113397 (or 41339113395 counting only the distinct ones).

The product of its digits is 11340000, while the sum is 52.

The spelling of 165356453572 in words is "one hundred sixty-five billion, three hundred fifty-six million, four hundred fifty-three thousand, five hundred seventy-two".