12640103775 has 72 divisors (see below), whose sum is σ = 24406614960. Its totient is φ = 6216376320.

The previous prime is 12640103771. The next prime is 12640103783. The reversal of 12640103775 is 57730104621.

It is a happy number.

12640103775 is a `hidden beast` number, since 1 + 2 + 640 + 1 + 0 + 3 + 7 + 7 + 5 = 666.

It is not a de Polignac number, because 12640103775 - 2² = 12640103771 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12640103771) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 4119792 + ... + 4122858.

Almost surely, 2^12640103775 is an apocalyptic number.

12640103775 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12640103775 is a deficient number, since it is larger than the sum of its proper divisors (11766511185).

12640103775 is a wasteful number, since it uses less digits than its factorization.

12640103775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4505 (or 4497 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The spelling of 12640103775 in words is "twelve billion, six hundred forty million, one hundred three thousand, seven hundred seventy-five".