256859416907 has 4 divisors (see below), whose sum is σ = 263124280776. Its totient is φ = 250594553040.

The previous prime is 256859416883. The next prime is 256859416909. The reversal of 256859416907 is 709614958652.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 256859416907 - 2²⁶ = 256792308043 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 256859416907.

It is not an unprimeable number, because it can be changed into a prime (256859416909) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3132431873 + ... + 3132431954.

It is an arithmetic number, because the mean of its divisors is an integer number (65781070194).

Almost surely, 2^256859416907 is an apocalyptic number.

256859416907 is a deficient number, since it is larger than the sum of its proper divisors (6264863869).

256859416907 is an equidigital number, since it uses as much as digits as its factorization.

256859416907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6264863868.

The product of its (nonzero) digits is 32659200, while the sum is 62.

Adding to 256859416907 its sum of digits (62), we get a square (256859416969 = 506813²).

The spelling of 256859416907 in words is "two hundred fifty-six billion, eight hundred fifty-nine million, four hundred sixteen thousand, nine hundred seven".