256357035858 has 256 divisors, whose sum is σ = 661602816000. Its totient is φ = 65642250240.

The previous prime is 256357035827. The next prime is 256357035901. The reversal of 256357035858 is 858530753652.

It is a junction number, because it is equal to n+sod(n) for n = 256357035798 and 256357035807.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 808697116 + ... + 808697432.

It is an arithmetic number, because the mean of its divisors is an integer number (2584386000).

Almost surely, 2^256357035858 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 256357035858, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (330801408000).

256357035858 is an abundant number, since it is smaller than the sum of its proper divisors (405245780142).

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

256357035858 is a wasteful number, since it uses less digits than its factorization.

256357035858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 750 (or 736 counting only the distinct ones).

The product of its (nonzero) digits is 30240000, while the sum is 57.

The spelling of 256357035858 in words is "two hundred fifty-six billion, three hundred fifty-seven million, thirty-five thousand, eight hundred fifty-eight".