16991475252 has 24 divisors (see below), whose sum is σ = 39649545600. Its totient is φ = 5663429376.

The previous prime is 16991475229. The next prime is 16991475271. The reversal of 16991475252 is 25257419961.

It is a junction number, because it is equal to n+sod(n) for n = 16991475195 and 16991475204.

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, 167524 + ... + 249092.

It is an arithmetic number, because the mean of its divisors is an integer number (1652064400).

Almost surely, 2^16991475252 is an apocalyptic number.

16991475252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16991475252 is an abundant number, since it is smaller than the sum of its proper divisors (22658070348).

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

16991475252 is a wasteful number, since it uses less digits than its factorization.

16991475252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98935 (or 98933 counting only the distinct ones).

The product of its digits is 1360800, while the sum is 51.

The spelling of 16991475252 in words is "sixteen billion, nine hundred ninety-one million, four hundred seventy-five thousand, two hundred fifty-two".