256745217577274 has 16 divisors (see below), whose sum is σ = 403664151808512. Its totient is φ = 122240557866768.

The previous prime is 256745217577273. The next prime is 256745217577291. The reversal of 256745217577274 is 472775712547652.

It is a super-2 number, since 2×256745217577274² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 256745217577198 and 256745217577207.

It is not an unprimeable number, because it can be changed into a prime (256745217577271) 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, 12514379369 + ... + 12514399884.

It is an arithmetic number, because the mean of its divisors is an integer number (25229009488032).

Almost surely, 2^{256745217577274} is an apocalyptic number.

256745217577274 is a deficient number, since it is larger than the sum of its proper divisors (146918934231238).

256745217577274 is a wasteful number, since it uses less digits than its factorization.

256745217577274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25028779501.

The product of its digits is 1613472000, while the sum is 71.

The spelling of 256745217577274 in words is "two hundred fifty-six trillion, seven hundred forty-five billion, two hundred seventeen million, five hundred seventy-seven thousand, two hundred seventy-four".