16564980 has 24 divisors (see below), whose sum is σ = 46382112. Its totient is φ = 4417312.

The previous prime is 16564973. The next prime is 16565023. The reversal of 16564980 is 8946561.

It is a congruent number.

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, 137982 + ... + 138101.

It is an arithmetic number, because the mean of its divisors is an integer number (1932588).

Almost surely, 2^16564980 is an apocalyptic number.

16564980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16564980 is an abundant number, since it is smaller than the sum of its proper divisors (29817132).

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

16564980 is a wasteful number, since it uses less digits than its factorization.

16564980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276095 (or 276093 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 16564980 is about 4070.0098279980. The cubic root of 16564980 is about 254.9159276866.

The spelling of 16564980 in words is "sixteen million, five hundred sixty-four thousand, nine hundred eighty".