16955981199680 has 56 divisors (see below), whose sum is σ = 41235503251968. Its totient is φ = 6638086251008.

The previous prime is 16955981199667. The next prime is 16955981199691. The reversal of 16955981199680 is 8699118955961.

It is a super-2 number, since 2×16955981199680² (a number of 27 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 7 ways as a sum of consecutive naturals, for example, 563681144 + ... + 563711223.

Almost surely, 2^{16955981199680} is an apocalyptic number.

16955981199680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16955981199680 is an abundant number, since it is smaller than the sum of its proper divisors (24279522052288).

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

16955981199680 is a wasteful number, since it uses less digits than its factorization.

16955981199680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1127392431 (or 1127392421 counting only the distinct ones).

The product of its (nonzero) digits is 377913600, while the sum is 77.

The spelling of 16955981199680 in words is "sixteen trillion, nine hundred fifty-five billion, nine hundred eighty-one million, one hundred ninety-nine thousand, six hundred eighty".