64312636 has 24 divisors (see below), whose sum is σ = 114544640. Its totient is φ = 31590000.

The previous prime is 64312627. The next prime is 64312637. The reversal of 64312636 is 63621346.

It is a super-2 number, since 2×64312636² = 8272230298536992, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64312598 and 64312607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64312637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85261 + ... + 86011.

Almost surely, 2^64312636 is an apocalyptic number.

It is an amenable number.

64312636 is a deficient number, since it is larger than the sum of its proper divisors (50232004).

64312636 is a wasteful number, since it uses less digits than its factorization.

64312636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1105 (or 1103 counting only the distinct ones).

The product of its digits is 15552, while the sum is 31.

The square root of 64312636 is about 8019.5159454920. The cubic root of 64312636 is about 400.6502673082.

The spelling of 64312636 in words is "sixty-four million, three hundred twelve thousand, six hundred thirty-six".