256501351455 has 16 divisors (see below), whose sum is σ = 410569119360. Its totient is φ = 136745068448.

The previous prime is 256501351429. The next prime is 256501351459. The reversal of 256501351455 is 554153105652.

It is a happy number.

256501351455 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 256501351455 - 2⁶ = 256501351391 is a prime.

It is a super-3 number, since 3×256501351455³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256501351459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3440157 + ... + 3513926.

It is an arithmetic number, because the mean of its divisors is an integer number (25660569960).

Almost surely, 2^256501351455 is an apocalyptic number.

256501351455 is a deficient number, since it is larger than the sum of its proper divisors (154067767905).

256501351455 is a wasteful number, since it uses less digits than its factorization.

256501351455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6956550.

The product of its (nonzero) digits is 450000, while the sum is 42.

The spelling of 256501351455 in words is "two hundred fifty-six billion, five hundred one million, three hundred fifty-one thousand, four hundred fifty-five".