21849488554256 has 40 divisors (see below), whose sum is σ = 46286121721824. Its totient is φ = 9909166741760.

The previous prime is 21849488554241. The next prime is 21849488554337. The reversal of 21849488554256 is 65245588494812.

It is a self number, because there is not a number n which added to its sum of digits gives 21849488554256.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140040341 + ... + 140196276.

Almost surely, 2^{21849488554256} is an apocalyptic number.

It is an amenable number.

21849488554256 is an abundant number, since it is smaller than the sum of its proper divisors (24436633167568).

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

21849488554256 is a wasteful number, since it uses less digits than its factorization.

21849488554256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280237079 (or 280237073 counting only the distinct ones).

The product of its digits is 884736000, while the sum is 71.

The spelling of 21849488554256 in words is "twenty-one trillion, eight hundred forty-nine billion, four hundred eighty-eight million, five hundred fifty-four thousand, two hundred fifty-six".