64426061256 has 16 divisors (see below), whose sum is σ = 161065153200. Its totient is φ = 21475353744.

The previous prime is 64426061243. The next prime is 64426061257. The reversal of 64426061256 is 65216062446.

It is not an unprimeable number, because it can be changed into a prime (64426061257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1342209586 + ... + 1342209633.

It is an arithmetic number, because the mean of its divisors is an integer number (10066572075).

Almost surely, 2^64426061256 is an apocalyptic number.

It is an amenable number.

64426061256 is an abundant number, since it is smaller than the sum of its proper divisors (96639091944).

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

64426061256 is a wasteful number, since it uses less digits than its factorization.

64426061256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2684419228 (or 2684419224 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 42.

The spelling of 64426061256 in words is "sixty-four billion, four hundred twenty-six million, sixty-one thousand, two hundred fifty-six".