85631634387 has 12 divisors (see below), whose sum is σ = 133204764784. Its totient is φ = 52696390320.

The previous prime is 85631634383. The next prime is 85631634419. The reversal of 85631634387 is 78343613658.

85631634387 is a `hidden beast` number, since 8 + 563 + 16 + 34 + 38 + 7 = 666.

It is not a de Polignac number, because 85631634387 - 2² = 85631634383 is a prime.

It is not an unprimeable number, because it can be changed into a prime (85631634383) 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, 365947039 + ... + 365947272.

Almost surely, 2^85631634387 is an apocalyptic number.

85631634387 is a deficient number, since it is larger than the sum of its proper divisors (47573130397).

85631634387 is a wasteful number, since it uses less digits than its factorization.

85631634387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 731894330 (or 731894327 counting only the distinct ones).

The product of its digits is 8709120, while the sum is 54.

The spelling of 85631634387 in words is "eighty-five billion, six hundred thirty-one million, six hundred thirty-four thousand, three hundred eighty-seven".