12697581599 has 4 divisors (see below), whose sum is σ = 12858310560. Its totient is φ = 12536852640.

The previous prime is 12697581587. The next prime is 12697581601. The reversal of 12697581599 is 99518579621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99518579621 = 88007 ⋅1130803.

It is a cyclic number.

It is not a de Polignac number, because 12697581599 - 2⁸ = 12697581343 is a prime.

It is a super-2 number, since 2×12697581599² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12697587599) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80364362 + ... + 80364519.

It is an arithmetic number, because the mean of its divisors is an integer number (3214577640).

Almost surely, 2^12697581599 is an apocalyptic number.

12697581599 is a deficient number, since it is larger than the sum of its proper divisors (160728961).

12697581599 is an equidigital number, since it uses as much as digits as its factorization.

12697581599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160728960.

The product of its digits is 12247200, while the sum is 62.

The spelling of 12697581599 in words is "twelve billion, six hundred ninety-seven million, five hundred eighty-one thousand, five hundred ninety-nine".