256601251753 has 32 divisors (see below), whose sum is σ = 330600010752. Its totient is φ = 193365144000.

The previous prime is 256601251733. The next prime is 256601251759. The reversal of 256601251753 is 357152106652.

It is not a de Polignac number, because 256601251753 - 2⁹ = 256601251241 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is not an unprimeable number, because it can be changed into a prime (256601251759) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 49251 + ... + 718072.

It is an arithmetic number, because the mean of its divisors is an integer number (10331250336).

Almost surely, 2^256601251753 is an apocalyptic number.

It is an amenable number.

256601251753 is a deficient number, since it is larger than the sum of its proper divisors (73998758999).

256601251753 is a wasteful number, since it uses less digits than its factorization.

256601251753 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 767485.

The product of its (nonzero) digits is 378000, while the sum is 43.

The spelling of 256601251753 in words is "two hundred fifty-six billion, six hundred one million, two hundred fifty-one thousand, seven hundred fifty-three".