12641815569 has 8 divisors (see below), whose sum is σ = 16857464512. Its totient is φ = 8427021840.

The previous prime is 12641815523. The next prime is 12641815577. The reversal of 12641815569 is 96551814621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12641815569 - 2²⁵ = 12608261137 is a prime.

It is a super-2 number, since 2×12641815569² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12641811569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 178477 + ... + 239034.

It is an arithmetic number, because the mean of its divisors is an integer number (2107183064).

Almost surely, 2^12641815569 is an apocalyptic number.

It is an amenable number.

12641815569 is a deficient number, since it is larger than the sum of its proper divisors (4215648943).

12641815569 is a wasteful number, since it uses less digits than its factorization.

12641815569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427607.

The product of its digits is 518400, while the sum is 48.

The spelling of 12641815569 in words is "twelve billion, six hundred forty-one million, eight hundred fifteen thousand, five hundred sixty-nine".