256051253455 has 8 divisors (see below), whose sum is σ = 307264924512. Its totient is φ = 204838722528.

The previous prime is 256051253431. The next prime is 256051253467. The reversal of 256051253455 is 554352150652.

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

It is a cyclic number.

It is not a de Polignac number, because 256051253455 - 2¹⁹ = 256050729167 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 329502 + ... + 787828.

It is an arithmetic number, because the mean of its divisors is an integer number (38408115564).

Almost surely, 2^256051253455 is an apocalyptic number.

256051253455 is a deficient number, since it is larger than the sum of its proper divisors (51213671057).

256051253455 is a wasteful number, since it uses less digits than its factorization.

256051253455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 570065.

The product of its (nonzero) digits is 900000, while the sum is 43.

The spelling of 256051253455 in words is "two hundred fifty-six billion, fifty-one million, two hundred fifty-three thousand, four hundred fifty-five".