16565400672272 has 10 divisors (see below), whose sum is σ = 32095463802558. Its totient is φ = 8282700336128.

The previous prime is 16565400672241. The next prime is 16565400672277. The reversal of 16565400672272 is 27227600456561.

It can be written as a sum of positive squares in only one way, i.e., 10646281482496 + 5919119189776 = 3262864^2 + 2432924^2 .

It is not an unprimeable number, because it can be changed into a prime (16565400672277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 517668770993 + ... + 517668771024.

Almost surely, 2^{16565400672272} is an apocalyptic number.

It is an amenable number.

16565400672272 is a deficient number, since it is larger than the sum of its proper divisors (15530063130286).

16565400672272 is a wasteful number, since it uses less digits than its factorization.

16565400672272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1035337542025 (or 1035337542019 counting only the distinct ones).

The product of its (nonzero) digits is 8467200, while the sum is 53.

The spelling of 16565400672272 in words is "sixteen trillion, five hundred sixty-five billion, four hundred million, six hundred seventy-two thousand, two hundred seventy-two".