256016671787 has 16 divisors (see below), whose sum is σ = 270100828800. Its totient is φ = 241994096640.

The previous prime is 256016671777. The next prime is 256016671811. The reversal of 256016671787 is 787176610652.

It is a cyclic number.

It is not a de Polignac number, because 256016671787 - 2⁸ = 256016671531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256016671717) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16658987 + ... + 16674347.

It is an arithmetic number, because the mean of its divisors is an integer number (16881301800).

Almost surely, 2^256016671787 is an apocalyptic number.

256016671787 is a deficient number, since it is larger than the sum of its proper divisors (14084157013).

256016671787 is a wasteful number, since it uses less digits than its factorization.

256016671787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17306.

The product of its (nonzero) digits is 5927040, while the sum is 56.

The spelling of 256016671787 in words is "two hundred fifty-six billion, sixteen million, six hundred seventy-one thousand, seven hundred eighty-seven".