6426512631 has 72 divisors (see below), whose sum is σ = 11801462400. Its totient is φ = 3332357280.

The previous prime is 6426512627. The next prime is 6426512657. The reversal of 6426512631 is 1362156246.

6426512631 is a `hidden beast` number, since 6 + 4 + 2 + 6 + 5 + 12 + 631 = 666.

It is not a de Polignac number, because 6426512631 - 2² = 6426512627 is a prime.

It is a super-2 number, since 2×6426512631² = 82600129192805084322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6426512621) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 4069200 + ... + 4070778.

It is an arithmetic number, because the mean of its divisors is an integer number (163909200).

Almost surely, 2^6426512631 is an apocalyptic number.

6426512631 is a deficient number, since it is larger than the sum of its proper divisors (5374949769).

6426512631 is a wasteful number, since it uses less digits than its factorization.

6426512631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2449 (or 2439 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 6426512631 is about 80165.5326870595. The cubic root of 6426512631 is about 1859.1957666035.

Adding to 6426512631 its reverse (1362156246), we get a palindrome (7788668877).

The spelling of 6426512631 in words is "six billion, four hundred twenty-six million, five hundred twelve thousand, six hundred thirty-one".