636689223612 has 96 divisors (see below), whose sum is σ = 1834994524160. Its totient is φ = 189584867520.

The previous prime is 636689223593. The next prime is 636689223629. The reversal of 636689223612 is 216322986636.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7270708 + ... + 7357755.

Almost surely, 2^636689223612 is an apocalyptic number.

636689223612 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

636689223612 is an abundant number, since it is smaller than the sum of its proper divisors (1198305300548).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

636689223612 is a wasteful number, since it uses less digits than its factorization.

636689223612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14628520 (or 14628512 counting only the distinct ones).

The product of its digits is 6718464, while the sum is 54.

The spelling of 636689223612 in words is "six hundred thirty-six billion, six hundred eighty-nine million, two hundred twenty-three thousand, six hundred twelve".