256350762128 has 20 divisors (see below), whose sum is σ = 496865220540. Its totient is φ = 128127479424.

The previous prime is 256350762121. The next prime is 256350762167. The reversal of 256350762128 is 821267053652.

It can be written as a sum of positive squares in 2 ways, for example, as 13668415744 + 242682346384 = 116912^2 + 492628^2 .

It is not an unprimeable number, because it can be changed into a prime (256350762121) 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, 2949683 + ... + 3035346.

It is an arithmetic number, because the mean of its divisors is an integer number (24843261027).

Almost surely, 2^256350762128 is an apocalyptic number.

It is an amenable number.

256350762128 is a deficient number, since it is larger than the sum of its proper divisors (240514458412).

256350762128 is a wasteful number, since it uses less digits than its factorization.

256350762128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5987714 (or 5987708 counting only the distinct ones).

The product of its (nonzero) digits is 1209600, while the sum is 47.

The spelling of 256350762128 in words is "two hundred fifty-six billion, three hundred fifty million, seven hundred sixty-two thousand, one hundred twenty-eight".