109821607564 has 12 divisors (see below), whose sum is σ = 192195285688. Its totient is φ = 54908668800.

The previous prime is 109821607543. The next prime is 109821607573. The reversal of 109821607564 is 465706128901.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 415077 + ... + 626044.

Almost surely, 2^109821607564 is an apocalyptic number.

It is an amenable number.

109821607564 is a deficient number, since it is larger than the sum of its proper divisors (82373678124).

109821607564 is a wasteful number, since it uses less digits than its factorization.

109821607564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1067496 (or 1067494 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 49.

The spelling of 109821607564 in words is "one hundred nine billion, eight hundred twenty-one million, six hundred seven thousand, five hundred sixty-four".