16946561172 has 48 divisors (see below), whose sum is σ = 39740137472. Its totient is φ = 5620618080.

The previous prime is 16946561143. The next prime is 16946561227. The reversal of 16946561172 is 27116564961.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2034897 + ... + 2043207.

Almost surely, 2^16946561172 is an apocalyptic number.

16946561172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16946561172 is an abundant number, since it is smaller than the sum of its proper divisors (22793576300).

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

16946561172 is a wasteful number, since it uses less digits than its factorization.

16946561172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9148 (or 9146 counting only the distinct ones).

The product of its digits is 544320, while the sum is 48.

The spelling of 16946561172 in words is "sixteen billion, nine hundred forty-six million, five hundred sixty-one thousand, one hundred seventy-two".