256398454032 has 160 divisors (see below), whose sum is σ = 798031970304. Its totient is φ = 69385075200.

The previous prime is 256398454019. The next prime is 256398454043. The reversal of 256398454032 is 230454893652.

256398454032 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 227682 + ... + 751422.

Almost surely, 2^256398454032 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 256398454032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (399015985152).

256398454032 is an abundant number, since it is smaller than the sum of its proper divisors (541633516272).

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

256398454032 is a wasteful number, since it uses less digits than its factorization.

256398454032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 523837 (or 523831 counting only the distinct ones).

The product of its (nonzero) digits is 6220800, while the sum is 51.

The spelling of 256398454032 in words is "two hundred fifty-six billion, three hundred ninety-eight million, four hundred fifty-four thousand, thirty-two".