12641322125256 has 64 divisors (see below), whose sum is σ = 34511839776000. Its totient is φ = 3826758484800.

The previous prime is 12641322125251. The next prime is 12641322125273. The reversal of 12641322125256 is 65252122314621.

It is not an unprimeable number, because it can be changed into a prime (12641322125251) 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, 24400606 + ... + 24913293.

It is an arithmetic number, because the mean of its divisors is an integer number (539247496500).

Almost surely, 2^{12641322125256} is an apocalyptic number.

It is an amenable number.

12641322125256 is an abundant number, since it is smaller than the sum of its proper divisors (21870517650744).

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

12641322125256 is a wasteful number, since it uses less digits than its factorization.

12641322125256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49314890 (or 49314886 counting only the distinct ones).

The product of its digits is 345600, while the sum is 42.

Adding to 12641322125256 its reverse (65252122314621), we get a palindrome (77893444439877).

The spelling of 12641322125256 in words is "twelve trillion, six hundred forty-one billion, three hundred twenty-two million, one hundred twenty-five thousand, two hundred fifty-six".