312491610478 has 4 divisors (see below), whose sum is σ = 468737415720. Its totient is φ = 156245805238.

The previous prime is 312491610439. The next prime is 312491610479. The reversal of 312491610478 is 874016194213.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312491610479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78122902618 + ... + 78122902621.

It is an arithmetic number, because the mean of its divisors is an integer number (117184353930).

Almost surely, 2^312491610478 is an apocalyptic number.

312491610478 is a deficient number, since it is larger than the sum of its proper divisors (156245805242).

312491610478 is a wasteful number, since it uses less digits than its factorization.

312491610478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156245805241.

The product of its (nonzero) digits is 290304, while the sum is 46.

The spelling of 312491610478 in words is "three hundred twelve billion, four hundred ninety-one million, six hundred ten thousand, four hundred seventy-eight".