256039498971 has 24 divisors (see below), whose sum is σ = 372340833696. Its totient is φ = 169536729600.

The previous prime is 256039498937. The next prime is 256039498993. The reversal of 256039498971 is 179894930652.

256039498971 is a `hidden beast` number, since 2 + 56 + 0 + 3 + 9 + 498 + 97 + 1 = 666.

It is not a de Polignac number, because 256039498971 - 2⁹ = 256039498459 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 256039498899 and 256039498908.

It is not an unprimeable number, because it can be changed into a prime (256039498571) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13761451 + ... + 13780043.

It is an arithmetic number, because the mean of its divisors is an integer number (15514201404).

It is a 1-persistent number, because it is pandigital, but 2⋅256039498971 = 512078997942 is not.

Almost surely, 2^256039498971 is an apocalyptic number.

256039498971 is a deficient number, since it is larger than the sum of its proper divisors (116301334725).

256039498971 is a wasteful number, since it uses less digits than its factorization.

256039498971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28883 (or 28880 counting only the distinct ones).

The product of its (nonzero) digits is 29393280, while the sum is 63.

The spelling of 256039498971 in words is "two hundred fifty-six billion, thirty-nine million, four hundred ninety-eight thousand, nine hundred seventy-one".