16516640601 has 6 divisors (see below), whose sum is σ = 23857369770. Its totient is φ = 11011093728.

The previous prime is 16516640573. The next prime is 16516640627. The reversal of 16516640601 is 10604661561.

It is a happy number.

16516640601 is a `hidden beast` number, since 1 + 6 + 5 + 1 + 6 + 6 + 40 + 601 = 666.

It can be written as a sum of positive squares in only one way, i.e., 14756418576 + 1760222025 = 121476^2 + 41955^2 .

It is not a de Polignac number, because 16516640601 - 2⁹ = 16516640089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16516640671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 917591136 + ... + 917591153.

It is an arithmetic number, because the mean of its divisors is an integer number (3976228295).

Almost surely, 2^16516640601 is an apocalyptic number.

It is an amenable number.

16516640601 is a deficient number, since it is larger than the sum of its proper divisors (7340729169).

16516640601 is a wasteful number, since it uses less digits than its factorization.

16516640601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1835182295 (or 1835182292 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The spelling of 16516640601 in words is "sixteen billion, five hundred sixteen million, six hundred forty thousand, six hundred one".