12161641264 has 20 divisors (see below), whose sum is σ = 23580459504. Its totient is φ = 6076361408.

The previous prime is 12161641249. The next prime is 12161641307. The reversal of 12161641264 is 46214616121.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 256147 + ... + 299890.

Almost surely, 2^12161641264 is an apocalyptic number.

It is an amenable number.

12161641264 is a deficient number, since it is larger than the sum of its proper divisors (11418818240).

12161641264 is a wasteful number, since it uses less digits than its factorization.

12161641264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557412 (or 557406 counting only the distinct ones).

The product of its digits is 13824, while the sum is 34.

The spelling of 12161641264 in words is "twelve billion, one hundred sixty-one million, six hundred forty-one thousand, two hundred sixty-four".