12646125408 has 72 divisors (see below), whose sum is σ = 38615861592. Its totient is φ = 3613177344.

The previous prime is 12646125407. The next prime is 12646125409. The reversal of 12646125408 is 80452164621.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12646125407) and next prime (12646125409).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12646125407) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1339485 + ... + 1348892.

It is an arithmetic number, because the mean of its divisors is an integer number (536331411).

Almost surely, 2^12646125408 is an apocalyptic number.

It is an amenable number.

12646125408 is an abundant number, since it is smaller than the sum of its proper divisors (25969736184).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12646125408 is a wasteful number, since it uses less digits than its factorization.

12646125408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2688404 (or 2688389 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 39.

The spelling of 12646125408 in words is "twelve billion, six hundred forty-six million, one hundred twenty-five thousand, four hundred eight".