636500447340 has 48 divisors (see below), whose sum is σ = 1784366884608. Its totient is φ = 169527201984.

The previous prime is 636500447329. The next prime is 636500447377. The reversal of 636500447340 is 43744005636.

It is a super-2 number, since 2×636500447340² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 636500447292 and 636500447301.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6395542 + ... + 6494301.

It is an arithmetic number, because the mean of its divisors is an integer number (37174310096).

Almost surely, 2^636500447340 is an apocalyptic number.

636500447340 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

636500447340 is an abundant number, since it is smaller than the sum of its proper divisors (1147866437268).

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

636500447340 is a wasteful number, since it uses less digits than its factorization.

636500447340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12890678 (or 12890676 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 42.

The spelling of 636500447340 in words is "six hundred thirty-six billion, five hundred million, four hundred forty-seven thousand, three hundred forty".