16721245692 has 30 divisors (see below), whose sum is σ = 43712640048. Its totient is φ = 5573748456.

The previous prime is 16721245687. The next prime is 16721245693. The reversal of 16721245692 is 29654212761.

16721245692 is a `hidden beast` number, since 1 + 6 + 72 + 12 + 4 + 569 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16721245693) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 25804068 + ... + 25804715.

Almost surely, 2^16721245692 is an apocalyptic number.

16721245692 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16721245692 is an abundant number, since it is smaller than the sum of its proper divisors (26991394356).

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

16721245692 is a wasteful number, since it uses less digits than its factorization.

16721245692 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51608799 (or 51608788 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The spelling of 16721245692 in words is "sixteen billion, seven hundred twenty-one million, two hundred forty-five thousand, six hundred ninety-two".