312491610491 has 2 divisors, whose sum is σ = 312491610492. Its totient is φ = 312491610490.

The previous prime is 312491610479. The next prime is 312491610527. The reversal of 312491610491 is 194016194213.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 312491610491 - 2¹⁸ = 312491348347 is a prime.

It is a super-2 number, since 2×312491610491² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (312491610401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156245805245 + 156245805246.

It is an arithmetic number, because the mean of its divisors is an integer number (156245805246).

Almost surely, 2^312491610491 is an apocalyptic number.

312491610491 is a deficient number, since it is larger than the sum of its proper divisors (1).

312491610491 is an equidigital number, since it uses as much as digits as its factorization.

312491610491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 41.

The spelling of 312491610491 in words is "three hundred twelve billion, four hundred ninety-one million, six hundred ten thousand, four hundred ninety-one".