256342405476 has 96 divisors (see below), whose sum is σ = 644475000960. Its totient is φ = 79007385600.

The previous prime is 256342405411. The next prime is 256342405531. The reversal of 256342405476 is 674504243652.

It is a happy number.

It is a super-2 number, since 2×256342405476² (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 31 ways as a sum of consecutive naturals, for example, 10677406 + ... + 10701386.

It is an arithmetic number, because the mean of its divisors is an integer number (6713281260).

Almost surely, 2^256342405476 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 256342405476, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (322237500480).

256342405476 is an abundant number, since it is smaller than the sum of its proper divisors (388132595484).

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

256342405476 is a wasteful number, since it uses less digits than its factorization.

256342405476 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24925 (or 24923 counting only the distinct ones).

The product of its (nonzero) digits is 4838400, while the sum is 48.

The spelling of 256342405476 in words is "two hundred fifty-six billion, three hundred forty-two million, four hundred five thousand, four hundred seventy-six".