8631690538 has 16 divisors (see below), whose sum is σ = 13704294240. Its totient is φ = 4066102800.

The previous prime is 8631690497. The next prime is 8631690547. The reversal of 8631690538 is 8350961368.

8631690538 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 8631690491 and 8631690500.

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, 620608 + ... + 634363.

It is an arithmetic number, because the mean of its divisors is an integer number (856518390).

Almost surely, 2^8631690538 is an apocalyptic number.

8631690538 is a deficient number, since it is larger than the sum of its proper divisors (5072603702).

8631690538 is a wasteful number, since it uses less digits than its factorization.

8631690538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1255173.

The product of its (nonzero) digits is 933120, while the sum is 49.

The square root of 8631690538 is about 92906.8917680492. The cubic root of 8631690538 is about 2051.3131018585.

The spelling of 8631690538 in words is "eight billion, six hundred thirty-one million, six hundred ninety thousand, five hundred thirty-eight".