249921953924844 has 24 divisors (see below), whose sum is σ = 613843395605440. Its totient is φ = 78922722291984.

The previous prime is 249921953924843. The next prime is 249921953924857. The reversal of 249921953924844 is 448429359129942.

It is a super-2 number, since 2×249921953924844² (a number of 30 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (249921953924843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 548074460134 + ... + 548074460589.

Almost surely, 2^{249921953924844} is an apocalyptic number.

It is an amenable number.

249921953924844 is an abundant number, since it is smaller than the sum of its proper divisors (363921441680596).

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

249921953924844 is a wasteful number, since it uses less digits than its factorization.

249921953924844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1096148920749 (or 1096148920747 counting only the distinct ones).

The product of its digits is 1612431360, while the sum is 75.

The spelling of 249921953924844 in words is "two hundred forty-nine trillion, nine hundred twenty-one billion, nine hundred fifty-three million, nine hundred twenty-four thousand, eight hundred forty-four".