63812085831 has 12 divisors (see below), whose sum is σ = 99263244808. Its totient is φ = 39268975824.

The previous prime is 63812085823. The next prime is 63812085833. The reversal of 63812085831 is 13858021836.

63812085831 is a `hidden beast` number, since 63 + 8 + 1 + 2 + 0 + 8 + 583 + 1 = 666.

It is not a de Polignac number, because 63812085831 - 2³ = 63812085823 is a prime.

It is a super-2 number, since 2×63812085831² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63812085833) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 272701105 + ... + 272701338.

Almost surely, 2^63812085831 is an apocalyptic number.

63812085831 is a deficient number, since it is larger than the sum of its proper divisors (35451158977).

63812085831 is a wasteful number, since it uses less digits than its factorization.

63812085831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545402462 (or 545402459 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The spelling of 63812085831 in words is "sixty-three billion, eight hundred twelve million, eighty-five thousand, eight hundred thirty-one".