16641634207 has 18 divisors (see below), whose sum is σ = 18727585296. Its totient is φ = 14776728120.

The previous prime is 16641634201. The next prime is 16641634213. The reversal of 16641634207 is 70243614661.

It is an interprime number because it is at equal distance from previous prime (16641634201) and next prime (16641634213).

It is not a de Polignac number, because 16641634207 - 2²⁷ = 16507416479 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16641634207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16641634201) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 186538 + ... + 260920.

Almost surely, 2^16641634207 is an apocalyptic number.

16641634207 is a deficient number, since it is larger than the sum of its proper divisors (2085951089).

16641634207 is an equidigital number, since it uses as much as digits as its factorization.

16641634207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74491 (or 74437 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 40.

The spelling of 16641634207 in words is "sixteen billion, six hundred forty-one million, six hundred thirty-four thousand, two hundred seven".