256517277422734 has 64 divisors (see below), whose sum is σ = 411272576796672. Its totient is φ = 119574542131200.

The previous prime is 256517277422719. The next prime is 256517277422743. The reversal of 256517277422734 is 437224772715652.

It is a super-2 number, since 2×256517277422734² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4418036064 + ... + 4418094124.

It is an arithmetic number, because the mean of its divisors is an integer number (6426134012448).

Almost surely, 2^{256517277422734} is an apocalyptic number.

256517277422734 is a deficient number, since it is larger than the sum of its proper divisors (154755299373938).

256517277422734 is a wasteful number, since it uses less digits than its factorization.

256517277422734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60781.

The product of its digits is 276595200, while the sum is 64.

The spelling of 256517277422734 in words is "two hundred fifty-six trillion, five hundred seventeen billion, two hundred seventy-seven million, four hundred twenty-two thousand, seven hundred thirty-four".