16518685272 has 32 divisors (see below), whose sum is σ = 43470225600. Its totient is φ = 5216426784.

The previous prime is 16518685241. The next prime is 16518685333. The reversal of 16518685272 is 27258681561.

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, 18112138 + ... + 18113049.

It is an arithmetic number, because the mean of its divisors is an integer number (1358444550).

Almost surely, 2^16518685272 is an apocalyptic number.

16518685272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16518685272 is an abundant number, since it is smaller than the sum of its proper divisors (26951540328).

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

16518685272 is a wasteful number, since it uses less digits than its factorization.

16518685272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36225215 (or 36225211 counting only the distinct ones).

The product of its digits is 1612800, while the sum is 51.

The spelling of 16518685272 in words is "sixteen billion, five hundred eighteen million, six hundred eighty-five thousand, two hundred seventy-two".