249045557136 has 40 divisors (see below), whose sum is σ = 646177183680. Its totient is φ = 82652670336.

The previous prime is 249045557021. The next prime is 249045557141. The reversal of 249045557136 is 631755540942.

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, 11317500 + ... + 11339483.

It is an arithmetic number, because the mean of its divisors is an integer number (16154429592).

Almost surely, 2^249045557136 is an apocalyptic number.

It is an amenable number.

249045557136 is an abundant number, since it is smaller than the sum of its proper divisors (397131626544).

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

249045557136 is a wasteful number, since it uses less digits than its factorization.

249045557136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22657223 (or 22657217 counting only the distinct ones).

The product of its (nonzero) digits is 4536000, while the sum is 51.

The spelling of 249045557136 in words is "two hundred forty-nine billion, forty-five million, five hundred fifty-seven thousand, one hundred thirty-six".