76636431 has 6 divisors (see below), whose sum is σ = 110697080. Its totient is φ = 51090948.

The previous prime is 76636423. The next prime is 76636447. The reversal of 76636431 is 13463667.

It is a happy number.

76636431 is a `hidden beast` number, since 7 + 6 + 6 + 3 + 643 + 1 = 666.

It is not a de Polignac number, because 76636431 - 2³ = 76636423 is a prime.

It is a super-2 number, since 2×76636431² = 11746285112835522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76636411) by changing a digit.

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, 4257571 + ... + 4257588.

Almost surely, 2^76636431 is an apocalyptic number.

76636431 is a deficient number, since it is larger than the sum of its proper divisors (34060649).

76636431 is a wasteful number, since it uses less digits than its factorization.

76636431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8515165 (or 8515162 counting only the distinct ones).

The product of its digits is 54432, while the sum is 36.

The square root of 76636431 is about 8754.2236092072. The cubic root of 76636431 is about 424.7614458238.

The spelling of 76636431 in words is "seventy-six million, six hundred thirty-six thousand, four hundred thirty-one".