165276397764 has 27 divisors (see below), whose sum is σ = 417788171437. Its totient is φ = 55091319504.

The previous prime is 165276397711. The next prime is 165276397771. The reversal of 165276397764 is 467793672561.

It is a happy number.

The square root of 165276397764 is 406542.

It is a perfect power (a square), and thus also a powerful number.

165276397764 is a `hidden beast` number, since 1 + 6 + 527 + 6 + 39 + 7 + 76 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 158746464900 + 6529932864 = 398430^2 + 80808^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2405374 + ... + 2473130.

Almost surely, 2^165276397764 is an apocalyptic number.

165276397764 is the 406542-nd square number.

It is an amenable number.

165276397764 is an abundant number, since it is smaller than the sum of its proper divisors (252511773673).

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

165276397764 is an frugal number, since it uses more digits than its factorization.

165276397764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135524 (or 67762 counting only the distinct ones).

The product of its digits is 80015040, while the sum is 63.

The spelling of 165276397764 in words is "one hundred sixty-five billion, two hundred seventy-six million, three hundred ninety-seven thousand, seven hundred sixty-four".