256649326354 has 8 divisors (see below), whose sum is σ = 385509421440. Its totient is φ = 128146185876.

The previous prime is 256649326343. The next prime is 256649326369. The reversal of 256649326354 is 453623946652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 256649326295 and 256649326304.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89236854 + ... + 89239729.

It is an arithmetic number, because the mean of its divisors is an integer number (48188677680).

Almost surely, 2^256649326354 is an apocalyptic number.

256649326354 is a deficient number, since it is larger than the sum of its proper divisors (128860095086).

256649326354 is a wasteful number, since it uses less digits than its factorization.

256649326354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178477304.

The product of its digits is 27993600, while the sum is 55.

The spelling of 256649326354 in words is "two hundred fifty-six billion, six hundred forty-nine million, three hundred twenty-six thousand, three hundred fifty-four".