16564402156 has 12 divisors (see below), whose sum is σ = 29069824392. Its totient is φ = 8258738048.

The previous prime is 16564402147. The next prime is 16564402157. The reversal of 16564402156 is 65120446561.

It is not an unprimeable number, because it can be changed into a prime (16564402157) 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, 5864170 + ... + 5866993.

It is an arithmetic number, because the mean of its divisors is an integer number (2422485366).

Almost surely, 2^16564402156 is an apocalyptic number.

It is an amenable number.

16564402156 is a deficient number, since it is larger than the sum of its proper divisors (12505422236).

16564402156 is a wasteful number, since it uses less digits than its factorization.

16564402156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11731520 (or 11731518 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 40.

The spelling of 16564402156 in words is "sixteen billion, five hundred sixty-four million, four hundred two thousand, one hundred fifty-six".