12640564513 has 8 divisors (see below), whose sum is σ = 12714024960. Its totient is φ = 12567144240.

The previous prime is 12640564493. The next prime is 12640564553. The reversal of 12640564513 is 31546504621.

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 12640564513 - 2¹³ = 12640556321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12640564553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 815328 + ... + 830686.

It is an arithmetic number, because the mean of its divisors is an integer number (1589253120).

Almost surely, 2^12640564513 is an apocalyptic number.

It is an amenable number.

12640564513 is a deficient number, since it is larger than the sum of its proper divisors (73460447).

12640564513 is a wasteful number, since it uses less digits than its factorization.

12640564513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20087.

The product of its (nonzero) digits is 86400, while the sum is 37.

The spelling of 12640564513 in words is "twelve billion, six hundred forty million, five hundred sixty-four thousand, five hundred thirteen".