12640280039 has 16 divisors (see below), whose sum is σ = 13672488960. Its totient is φ = 11651566080.

The previous prime is 12640280021. The next prime is 12640280053. The reversal of 12640280039 is 93008204621.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12640280039 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12640279990 and 12640280008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12640280069) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 133319 + ... + 207495.

It is an arithmetic number, because the mean of its divisors is an integer number (854530560).

Almost surely, 2^12640280039 is an apocalyptic number.

12640280039 is a deficient number, since it is larger than the sum of its proper divisors (1032208921).

12640280039 is a wasteful number, since it uses less digits than its factorization.

12640280039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74470.

The product of its (nonzero) digits is 20736, while the sum is 35.

The spelling of 12640280039 in words is "twelve billion, six hundred forty million, two hundred eighty thousand, thirty-nine".