16557411274664 has 16 divisors (see below), whose sum is σ = 33433234304820. Its totient is φ = 7641882126720.

The previous prime is 16557411274661. The next prime is 16557411274669. The reversal of 16557411274664 is 46647211475561.

16557411274664 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 13427519552164 + 3129891722500 = 3664358^2 + 1769150^2 .

It is not an unprimeable number, because it can be changed into a prime (16557411274661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79602938717 + ... + 79602938924.

Almost surely, 2^{16557411274664} is an apocalyptic number.

It is an amenable number.

16557411274664 is an abundant number, since it is smaller than the sum of its proper divisors (16875823030156).

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

16557411274664 is a wasteful number, since it uses less digits than its factorization.

16557411274664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159205877660 (or 159205877656 counting only the distinct ones).

The product of its digits is 33868800, while the sum is 59.

The spelling of 16557411274664 in words is "sixteen trillion, five hundred fifty-seven billion, four hundred eleven million, two hundred seventy-four thousand, six hundred sixty-four".