256097842442 has 32 divisors (see below), whose sum is σ = 419775326208. Its totient is φ = 116469648576.

The previous prime is 256097842421. The next prime is 256097842463. The reversal of 256097842442 is 244248790652.

It is an interprime number because it is at equal distance from previous prime (256097842421) and next prime (256097842463).

It is a super-2 number, since 2×256097842442² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 671588 + ... + 981440.

It is an arithmetic number, because the mean of its divisors is an integer number (13117978944).

Almost surely, 2^256097842442 is an apocalyptic number.

256097842442 is a deficient number, since it is larger than the sum of its proper divisors (163677483766).

256097842442 is a wasteful number, since it uses less digits than its factorization.

256097842442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310334.

The product of its (nonzero) digits is 7741440, while the sum is 53.

The spelling of 256097842442 in words is "two hundred fifty-six billion, ninety-seven million, eight hundred forty-two thousand, four hundred forty-two".