16516968647 has 16 divisors (see below), whose sum is σ = 18106403040. Its totient is φ = 14997061632.

The previous prime is 16516968583. The next prime is 16516968667. The reversal of 16516968647 is 74686961561.

It is not a de Polignac number, because 16516968647 - 2⁶ = 16516968583 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16516968667) 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, 619463 + ... + 645575.

It is an arithmetic number, because the mean of its divisors is an integer number (1131650190).

Almost surely, 2^16516968647 is an apocalyptic number.

16516968647 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

16516968647 is a deficient number, since it is larger than the sum of its proper divisors (1589434393).

16516968647 is a wasteful number, since it uses less digits than its factorization.

16516968647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27442.

The product of its digits is 13063680, while the sum is 59.

The spelling of 16516968647 in words is "sixteen billion, five hundred sixteen million, nine hundred sixty-eight thousand, six hundred forty-seven".