12640279996 has 24 divisors (see below), whose sum is σ = 22902571440. Its totient is φ = 6097056000.

The previous prime is 12640279973. The next prime is 12640279999. The reversal of 12640279996 is 69997204621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12640279999) 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, 93951 + ... + 184681.

It is an arithmetic number, because the mean of its divisors is an integer number (954273810).

Almost surely, 2^12640279996 is an apocalyptic number.

It is an amenable number.

12640279996 is a deficient number, since it is larger than the sum of its proper divisors (10262291444).

12640279996 is a wasteful number, since it uses less digits than its factorization.

12640279996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91965 (or 91963 counting only the distinct ones).

The product of its (nonzero) digits is 2939328, while the sum is 55.

The spelling of 12640279996 in words is "twelve billion, six hundred forty million, two hundred seventy-nine thousand, nine hundred ninety-six".