12751402640 has 40 divisors (see below), whose sum is σ = 30022304640. Its totient is φ = 5035994496.

The previous prime is 12751402637. The next prime is 12751402663. The reversal of 12751402640 is 4620415721.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 12751402597 and 12751402606.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1002494 + ... + 1015133.

It is an arithmetic number, because the mean of its divisors is an integer number (750557616).

Almost surely, 2^12751402640 is an apocalyptic number.

12751402640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12751402640 is an abundant number, since it is smaller than the sum of its proper divisors (17270902000).

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

12751402640 is a wasteful number, since it uses less digits than its factorization.

12751402640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2017719 (or 2017713 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 32.

The spelling of 12751402640 in words is "twelve billion, seven hundred fifty-one million, four hundred two thousand, six hundred forty".