249657864144 has 40 divisors (see below), whose sum is σ = 694560982752. Its totient is φ = 76817804160.

The previous prime is 249657864091. The next prime is 249657864161. The reversal of 249657864144 is 441468756942.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 200045742 + ... + 200046989.

Almost surely, 2^249657864144 is an apocalyptic number.

249657864144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

249657864144 is an abundant number, since it is smaller than the sum of its proper divisors (444903118608).

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

249657864144 is a wasteful number, since it uses less digits than its factorization.

249657864144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400092755 (or 400092749 counting only the distinct ones).

The product of its digits is 46448640, while the sum is 60.

The spelling of 249657864144 in words is "two hundred forty-nine billion, six hundred fifty-seven million, eight hundred sixty-four thousand, one hundred forty-four".