312471715978 has 16 divisors (see below), whose sum is σ = 469681712136. Its totient is φ = 155911436800.

The previous prime is 312471715957. The next prime is 312471716003. The reversal of 312471715978 is 879517174213.

It can be written as a sum of positive squares in 4 ways, for example, as 255624281649 + 56847434329 = 505593^2 + 238427^2 .

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, 2105550 + ... + 2249062.

Almost surely, 2^312471715978 is an apocalyptic number.

312471715978 is a deficient number, since it is larger than the sum of its proper divisors (157209996158).

312471715978 is a wasteful number, since it uses less digits than its factorization.

312471715978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145769.

The product of its digits is 2963520, while the sum is 55.

The spelling of 312471715978 in words is "three hundred twelve billion, four hundred seventy-one million, seven hundred fifteen thousand, nine hundred seventy-eight".