256481027195 has 4 divisors (see below), whose sum is σ = 307777232640. Its totient is φ = 205184821752.

The previous prime is 256481027191. The next prime is 256481027221. The reversal of 256481027195 is 591720184652.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 256481027195 - 2² = 256481027191 is a prime.

It is a super-2 number, since 2×256481027195² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (256481027191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25648102715 + ... + 25648102724.

It is an arithmetic number, because the mean of its divisors is an integer number (76944308160).

Almost surely, 2^256481027195 is an apocalyptic number.

256481027195 is a deficient number, since it is larger than the sum of its proper divisors (51296205445).

256481027195 is an equidigital number, since it uses as much as digits as its factorization.

256481027195 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51296205444.

The product of its (nonzero) digits is 1209600, while the sum is 50.

The spelling of 256481027195 in words is "two hundred fifty-six billion, four hundred eighty-one million, twenty-seven thousand, one hundred ninety-five".