256501226202464 has 48 divisors (see below), whose sum is σ = 505670810102640. Its totient is φ = 128077008407040.

The previous prime is 256501226202461. The next prime is 256501226202491. The reversal of 256501226202464 is 464202622105652.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256501226202461) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69684242 + ... + 73272750.

It is an arithmetic number, because the mean of its divisors is an integer number (10534808543805).

Almost surely, 2^{256501226202464} is an apocalyptic number.

It is an amenable number.

256501226202464 is a deficient number, since it is larger than the sum of its proper divisors (249169583900176).

256501226202464 is a wasteful number, since it uses less digits than its factorization.

256501226202464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3591543 (or 3591535 counting only the distinct ones).

The product of its (nonzero) digits is 2764800, while the sum is 47.

The spelling of 256501226202464 in words is "two hundred fifty-six trillion, five hundred one billion, two hundred twenty-six million, two hundred two thousand, four hundred sixty-four".