16860990816 has 72 divisors (see below), whose sum is σ = 47976541704. Its totient is φ = 5617036800.

The previous prime is 16860990767. The next prime is 16860990827. The reversal of 16860990816 is 61809906861.

16860990816 is a `hidden beast` number, since 16 + 8 + 609 + 9 + 0 + 8 + 16 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-2 number, since 2×16860990816² (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 11 ways as a sum of consecutive naturals, for example, 502435 + ... + 534941.

It is an arithmetic number, because the mean of its divisors is an integer number (666340857).

Almost surely, 2^16860990816 is an apocalyptic number.

16860990816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

16860990816 is an abundant number, since it is smaller than the sum of its proper divisors (31115550888).

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

16860990816 is a wasteful number, since it uses less digits than its factorization.

16860990816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34324 (or 34313 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 54.

The spelling of 16860990816 in words is "sixteen billion, eight hundred sixty million, nine hundred ninety thousand, eight hundred sixteen".