16231720506 has 16 divisors (see below), whose sum is σ = 32544402048. Its totient is φ = 5397080000.

The previous prime is 16231720489. The next prime is 16231720511. The reversal of 16231720506 is 60502713261.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3370770 + ... + 3375581.

It is an arithmetic number, because the mean of its divisors is an integer number (2034025128).

Almost surely, 2^16231720506 is an apocalyptic number.

16231720506 is an abundant number, since it is smaller than the sum of its proper divisors (16312681542).

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

16231720506 is a wasteful number, since it uses less digits than its factorization.

16231720506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6746757.

The product of its (nonzero) digits is 15120, while the sum is 33.

The spelling of 16231720506 in words is "sixteen billion, two hundred thirty-one million, seven hundred twenty thousand, five hundred six".