256011506671 has 8 divisors (see below), whose sum is σ = 258373962000. Its totient is φ = 253649301120.

The previous prime is 256011506629. The next prime is 256011506701. The reversal of 256011506671 is 176605110652.

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 256011506671 - 2¹⁵ = 256011473903 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 (256011596671) 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, 2466951 + ... + 2568631.

It is an arithmetic number, because the mean of its divisors is an integer number (32296745250).

Almost surely, 2^256011506671 is an apocalyptic number.

256011506671 is a deficient number, since it is larger than the sum of its proper divisors (2362455329).

256011506671 is a wasteful number, since it uses less digits than its factorization.

256011506671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124889.

The product of its (nonzero) digits is 75600, while the sum is 40.

The spelling of 256011506671 in words is "two hundred fifty-six billion, eleven million, five hundred six thousand, six hundred seventy-one".