100645636 has 24 divisors (see below), whose sum is σ = 216776000. Its totient is φ = 39815712.

The previous prime is 100645619. The next prime is 100645639. The reversal of 100645636 is 636546001.

It is a junction number, because it is equal to n+sod(n) for n = 100645598 and 100645607.

It is not an unprimeable number, because it can be changed into a prime (100645639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137886 + ... + 138613.

Almost surely, 2^100645636 is an apocalyptic number.

It is an amenable number.

100645636 is an abundant number, since it is smaller than the sum of its proper divisors (116130364).

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

100645636 is a wasteful number, since it uses less digits than its factorization.

100645636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276523 (or 276521 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 100645636 is about 10032.2298618004. The cubic root of 100645636 is about 465.1556668476.

The spelling of 100645636 in words is "one hundred million, six hundred forty-five thousand, six hundred thirty-six".