312491610440 has 32 divisors (see below), whose sum is σ = 704877207480. Its totient is φ = 124681784832.

The previous prime is 312491610439. The next prime is 312491610479. The reversal of 312491610440 is 44016194213.

It can be written as a sum of positive squares in 4 ways, for example, as 299508831076 + 12982779364 = 547274^2 + 113942^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 312491610440.

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, 9823277 + ... + 9855036.

Almost surely, 2^312491610440 is an apocalyptic number.

It is an amenable number.

312491610440 is an abundant number, since it is smaller than the sum of its proper divisors (392385597040).

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

312491610440 is a wasteful number, since it uses less digits than its factorization.

312491610440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19678721 (or 19678717 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 35.

The spelling of 312491610440 in words is "three hundred twelve billion, four hundred ninety-one million, six hundred ten thousand, four hundred forty".