256631677046741 has 8 divisors (see below), whose sum is σ = 262092757570560. Its totient is φ = 251170631192848.

The previous prime is 256631677046683. The next prime is 256631677046791. The reversal of 256631677046741 is 147640776136652.

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

It is a cyclic number.

It is not a de Polignac number, because 256631677046741 - 2²² = 256631672852437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256631677046791) 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, 6576575 + ... + 23590563.

It is an arithmetic number, because the mean of its divisors is an integer number (32761594696320).

Almost surely, 2^{256631677046741} is an apocalyptic number.

It is an amenable number.

256631677046741 is a deficient number, since it is larger than the sum of its proper divisors (5461080523819).

256631677046741 is a wasteful number, since it uses less digits than its factorization.

256631677046741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17334963.

The product of its (nonzero) digits is 213373440, while the sum is 65.

The spelling of 256631677046741 in words is "two hundred fifty-six trillion, six hundred thirty-one billion, six hundred seventy-seven million, forty-six thousand, seven hundred forty-one".