16564577117456 has 10 divisors (see below), whose sum is σ = 32093868165102. Its totient is φ = 8282288558720.

The previous prime is 16564577117383. The next prime is 16564577117479. The reversal of 16564577117456 is 65471177546561.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 13671802051600 + 2892775065856 = 3697540^2 + 1700816^2 .

It is a junction number, because it is equal to n+sod(n) for n = 16564577117392 and 16564577117401.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 517643034905 + ... + 517643034936.

Almost surely, 2^{16564577117456} is an apocalyptic number.

16564577117456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

16564577117456 is a deficient number, since it is larger than the sum of its proper divisors (15529291047646).

16564577117456 is a wasteful number, since it uses less digits than its factorization.

16564577117456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1035286069849 (or 1035286069843 counting only the distinct ones).

The product of its digits is 148176000, while the sum is 65.

The spelling of 16564577117456 in words is "sixteen trillion, five hundred sixty-four billion, five hundred seventy-seven million, one hundred seventeen thousand, four hundred fifty-six".