249612731869440 has 144 divisors (see below), whose sum is σ = 806805490696128. Its totient is φ = 65761426464768.

The previous prime is 249612731869367. The next prime is 249612731869447. The reversal of 249612731869440 is 44968137216942.

It is a super-2 number, since 2×249612731869440² (a number of 30 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (249612731869447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 391267519 + ... + 391904958.

It is an arithmetic number, because the mean of its divisors is an integer number (5602815907612).

Almost surely, 2^{249612731869440} is an apocalyptic number.

249612731869440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

249612731869440 is an abundant number, since it is smaller than the sum of its proper divisors (557192758826688).

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

249612731869440 is an equidigital number, since it uses as much as digits as its factorization.

249612731869440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 783172584 (or 783172570 counting only the distinct ones).

The product of its (nonzero) digits is 125411328, while the sum is 66.

The spelling of 249612731869440 in words is "two hundred forty-nine trillion, six hundred twelve billion, seven hundred thirty-one million, eight hundred sixty-nine thousand, four hundred forty".