16497969696 has 72 divisors (see below), whose sum is σ = 50525043660. Its totient is φ = 5076297216.

The previous prime is 16497969679. The next prime is 16497969739. The reversal of 16497969696 is 69696979461.

16497969696 is a `hidden beast` number, since 16 + 497 + 9 + 69 + 69 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 12715719696 + 3782250000 = 112764^2 + 61500^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (72).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2199511 + ... + 2206998.

Almost surely, 2^16497969696 is an apocalyptic number.

16497969696 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

16497969696 is an abundant number, since it is smaller than the sum of its proper divisors (34027073964).

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

16497969696 is a wasteful number, since it uses less digits than its factorization.

16497969696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4406538 (or 4406527 counting only the distinct ones).

The product of its digits is 238085568, while the sum is 72.

The spelling of 16497969696 in words is "sixteen billion, four hundred ninety-seven million, nine hundred sixty-nine thousand, six hundred ninety-six".