636427399696 has 45 divisors (see below), whose sum is σ = 1355441581039. Its totient is φ = 289269226400.

The previous prime is 636427399691. The next prime is 636427399697. The reversal of 636427399696 is 696993724636.

The square root of 636427399696 is 797764.

It is a perfect power (a square), and thus also a powerful number.

It is a super-3 number, since 3×636427399696³ (a number of 36 digits) contains 333 as substring.

It is a Duffinian number.

Its product of digits (476171136) is a multiple of the sum of its prime divisors (18144).

It is not an unprimeable number, because it can be changed into a prime (636427399691) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 35092551 + ... + 35110681.

Almost surely, 2^636427399696 is an apocalyptic number.

636427399696 is the 797764-th square number.

It is an amenable number.

636427399696 is an abundant number, since it is smaller than the sum of its proper divisors (719014181343).

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

636427399696 is an frugal number, since it uses more digits than its factorization.

636427399696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36292 (or 18144 counting only the distinct ones).

The product of its digits is 476171136, while the sum is 70.

The spelling of 636427399696 in words is "six hundred thirty-six billion, four hundred twenty-seven million, three hundred ninety-nine thousand, six hundred ninety-six".