12640144215635 has 8 divisors (see below), whose sum is σ = 15168233808720. Its totient is φ = 10112074872544.

The previous prime is 12640144215613. The next prime is 12640144215653. The reversal of 12640144215635 is 53651244104621.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 12640144215635 - 2²⁶ = 12640077106771 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3653600 + ... + 6215229.

It is an arithmetic number, because the mean of its divisors is an integer number (1896029226090).

Almost surely, 2^{12640144215635} is an apocalyptic number.

12640144215635 is a deficient number, since it is larger than the sum of its proper divisors (2528089593085).

12640144215635 is an equidigital number, since it uses as much as digits as its factorization.

12640144215635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10124997.

The product of its (nonzero) digits is 691200, while the sum is 44.

The spelling of 12640144215635 in words is "twelve trillion, six hundred forty billion, one hundred forty-four million, two hundred fifteen thousand, six hundred thirty-five".