216682072497 has 12 divisors (see below), whose sum is σ = 341438417424. Its totient is φ = 131322468120.

The previous prime is 216682072493. The next prime is 216682072543. The reversal of 216682072497 is 794270286612.

216682072497 is a `hidden beast` number, since 2 + 1 + 6 + 6 + 82 + 0 + 72 + 497 = 666.

It is not a de Polignac number, because 216682072497 - 2² = 216682072493 is a prime.

It is a super-2 number, since 2×216682072497² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (216682072493) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1094353803 + ... + 1094354000.

It is an arithmetic number, because the mean of its divisors is an integer number (28453201452).

Almost surely, 2^216682072497 is an apocalyptic number.

It is an amenable number.

216682072497 is a deficient number, since it is larger than the sum of its proper divisors (124756344927).

216682072497 is a wasteful number, since it uses less digits than its factorization.

216682072497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2188707820 (or 2188707817 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 54.

The spelling of 216682072497 in words is "two hundred sixteen billion, six hundred eighty-two million, seventy-two thousand, four hundred ninety-seven".