16556025425634 has 48 divisors (see below), whose sum is σ = 35891056437912. Its totient is φ = 5515650146304.

The previous prime is 16556025425609. The next prime is 16556025425651. The reversal of 16556025425634 is 43652452065561.

16556025425634 is a `hidden beast` number, since 1 + 6 + 5 + 5 + 60 + 2 + 542 + 5 + 6 + 34 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 14912765507025 + 1643259918609 = 3861705^2 + 1281897^2 .

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 261298102 + ... + 261361454.

Almost surely, 2^{16556025425634} is an apocalyptic number.

16556025425634 is an abundant number, since it is smaller than the sum of its proper divisors (19335031012278).

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

16556025425634 is a wasteful number, since it uses less digits than its factorization.

16556025425634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71091 (or 71088 counting only the distinct ones).

The product of its (nonzero) digits is 25920000, while the sum is 54.

The spelling of 16556025425634 in words is "sixteen trillion, five hundred fifty-six billion, twenty-five million, four hundred twenty-five thousand, six hundred thirty-four".