16402019916 has 12 divisors (see below), whose sum is σ = 38271379832. Its totient is φ = 5467339968.

The previous prime is 16402019911. The next prime is 16402019939. The reversal of 16402019916 is 61991020461.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (16402019911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 683417485 + ... + 683417508.

Almost surely, 2^16402019916 is an apocalyptic number.

It is an amenable number.

16402019916 is an abundant number, since it is smaller than the sum of its proper divisors (21869359916).

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

16402019916 is a wasteful number, since it uses less digits than its factorization.

16402019916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1366835000 (or 1366834998 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 39.

The spelling of 16402019916 in words is "sixteen billion, four hundred two million, nineteen thousand, nine hundred sixteen".