256517345301436 has 6 divisors (see below), whose sum is σ = 448905354277520. Its totient is φ = 128258672650716.

The previous prime is 256517345301433. The next prime is 256517345301493. The reversal of 256517345301436 is 634103543715652.

It is a super-2 number, since 2×256517345301436² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256517345301433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32064668162676 + ... + 32064668162683.

Almost surely, 2^{256517345301436} is an apocalyptic number.

It is an amenable number.

256517345301436 is a deficient number, since it is larger than the sum of its proper divisors (192388008976084).

256517345301436 is a wasteful number, since it uses less digits than its factorization.

256517345301436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64129336325363 (or 64129336325361 counting only the distinct ones).

The product of its (nonzero) digits is 27216000, while the sum is 55.

The spelling of 256517345301436 in words is "two hundred fifty-six trillion, five hundred seventeen billion, three hundred forty-five million, three hundred one thousand, four hundred thirty-six".