13407400656 has 60 divisors (see below), whose sum is σ = 40408421508. Its totient is φ = 4125353472.

The previous prime is 13407400651. The next prime is 13407400663. The reversal of 13407400656 is 65600470431.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 4662158400 + 8745242256 = 68280^2 + 93516^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 13407400656.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13407400651) 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, 3579165 + ... + 3582908.

Almost surely, 2^13407400656 is an apocalyptic number.

13407400656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

13407400656 is an abundant number, since it is smaller than the sum of its proper divisors (27001020852).

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

13407400656 is a wasteful number, since it uses less digits than its factorization.

13407400656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7162100 (or 7162091 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The spelling of 13407400656 in words is "thirteen billion, four hundred seven million, four hundred thousand, six hundred fifty-six".