12611664567 has 12 divisors (see below), whose sum is σ = 18228248064. Its totient is φ = 8402515200.

The previous prime is 12611664529. The next prime is 12611664577. The reversal of 12611664567 is 76546611621.

12611664567 is a `hidden beast` number, since 1 + 26 + 1 + 1 + 6 + 64 + 567 = 666.

It is not a de Polignac number, because 12611664567 - 2³¹ = 10464180919 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12611664577) 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, 423223 + ... + 452040.

It is an arithmetic number, because the mean of its divisors is an integer number (1519020672).

Almost surely, 2^12611664567 is an apocalyptic number.

12611664567 is a deficient number, since it is larger than the sum of its proper divisors (5616583497).

12611664567 is a wasteful number, since it uses less digits than its factorization.

12611664567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 876870 (or 876867 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The spelling of 12611664567 in words is "twelve billion, six hundred eleven million, six hundred sixty-four thousand, five hundred sixty-seven".