16490665822647 has 16 divisors (see below), whose sum is σ = 22214826466560. Its totient is φ = 10880147281152.

The previous prime is 16490665822619. The next prime is 16490665822691. The reversal of 16490665822647 is 74622856609461.

It is a happy number.

It is not a de Polignac number, because 16490665822647 - 2⁶ = 16490665822583 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16490665822447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10380358 + ... + 11863100.

It is an arithmetic number, because the mean of its divisors is an integer number (1388426654160).

Almost surely, 2^{16490665822647} is an apocalyptic number.

16490665822647 is a deficient number, since it is larger than the sum of its proper divisors (5724160643913).

16490665822647 is a wasteful number, since it uses less digits than its factorization.

16490665822647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1521062.

The product of its (nonzero) digits is 209018880, while the sum is 66.

The spelling of 16490665822647 in words is "sixteen trillion, four hundred ninety billion, six hundred sixty-five million, eight hundred twenty-two thousand, six hundred forty-seven".