6312691978 has 12 divisors (see below), whose sum is σ = 9486681750. Its totient is φ = 3150475616.

The previous prime is 6312691969. The next prime is 6312691997. The reversal of 6312691978 is 8791962136.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 2087301969 + 4225390009 = 45687^2 + 65003^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 642648 + ... + 652396.

Almost surely, 2^6312691978 is an apocalyptic number.

6312691978 is a deficient number, since it is larger than the sum of its proper divisors (3173989772).

6312691978 is an frugal number, since it uses more digits than its factorization.

6312691978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10889 (or 10320 counting only the distinct ones).

The product of its digits is 979776, while the sum is 52.

The square root of 6312691978 is about 79452.4510509273. The cubic root of 6312691978 is about 1848.1541831232.

The spelling of 6312691978 in words is "six billion, three hundred twelve million, six hundred ninety-one thousand, nine hundred seventy-eight".