16977684816 has 30 divisors (see below), whose sum is σ = 47513937770. Its totient is φ = 5659228224.

The previous prime is 16977684809. The next prime is 16977684851. The reversal of 16977684816 is 61848677961.

16977684816 is a `hidden beast` number, since 1 + 6 + 97 + 7 + 68 + 481 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 15425640000 + 1552044816 = 124200^2 + 39396^2 .

It is a super-2 number, since 2×16977684816² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 58950151 + ... + 58950438.

Almost surely, 2^16977684816 is an apocalyptic number.

16977684816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

16977684816 is an abundant number, since it is smaller than the sum of its proper divisors (30536252954).

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

16977684816 is a wasteful number, since it uses less digits than its factorization.

16977684816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117900603 (or 117900594 counting only the distinct ones).

The product of its digits is 24385536, while the sum is 63.

The spelling of 16977684816 in words is "sixteen billion, nine hundred seventy-seven million, six hundred eighty-four thousand, eight hundred sixteen".