16972796478 has 16 divisors (see below), whose sum is σ = 37031556096. Its totient is φ = 5143271640.

The previous prime is 16972796443. The next prime is 16972796497. The reversal of 16972796478 is 87469727961.

It is a Harshad number since it is a multiple of its sum of digits (66), and also a Moran number because the ratio is a prime number: 257163583 = 16972796478 / (1 + 6 + 9 + 7 + 2 + 7 + 9 + 6 + 4 + 7 + 8).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128581726 + ... + 128581857.

It is an arithmetic number, because the mean of its divisors is an integer number (2314472256).

Almost surely, 2^16972796478 is an apocalyptic number.

16972796478 is an abundant number, since it is smaller than the sum of its proper divisors (20058759618).

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

16972796478 is a wasteful number, since it uses less digits than its factorization.

16972796478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257163599.

The product of its digits is 64012032, while the sum is 66.

It can be divided in two parts, 16972 and 796478, that added together give a triangular number (813450 = T₁₂₇₅).

The spelling of 16972796478 in words is "sixteen billion, nine hundred seventy-two million, seven hundred ninety-six thousand, four hundred seventy-eight".