16991418936 has 32 divisors (see below), whose sum is σ = 42784156800. Its totient is φ = 5623058400.

The previous prime is 16991418929. The next prime is 16991418937. The reversal of 16991418936 is 63981419961.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16991418937) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2543340 + ... + 2550011.

It is an arithmetic number, because the mean of its divisors is an integer number (1337004900).

Almost surely, 2^16991418936 is an apocalyptic number.

It is an amenable number.

16991418936 is an abundant number, since it is smaller than the sum of its proper divisors (25792737864).

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

16991418936 is a wasteful number, since it uses less digits than its factorization.

16991418936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5093499 (or 5093495 counting only the distinct ones).

The product of its digits is 2519424, while the sum is 57.

The spelling of 16991418936 in words is "sixteen billion, nine hundred ninety-one million, four hundred eighteen thousand, nine hundred thirty-six".