256831201153 has 8 divisors (see below), whose sum is σ = 257840934120. Its totient is φ = 255823428480.

The previous prime is 256831201129. The next prime is 256831201171. The reversal of 256831201153 is 351102138652.

It can be written as a sum of positive squares in 4 ways, for example, as 9695947024 + 247135254129 = 98468^2 + 497127^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256831201153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256831205153) 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, 227250 + ... + 751867.

It is an arithmetic number, because the mean of its divisors is an integer number (32230116765).

Almost surely, 2^256831201153 is an apocalyptic number.

It is an amenable number.

256831201153 is a deficient number, since it is larger than the sum of its proper divisors (1009732967).

256831201153 is an equidigital number, since it uses as much as digits as its factorization.

256831201153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 980147.

The product of its (nonzero) digits is 43200, while the sum is 37.

The spelling of 256831201153 in words is "two hundred fifty-six billion, eight hundred thirty-one million, two hundred one thousand, one hundred fifty-three".