256923698659 has 8 divisors (see below), whose sum is σ = 259824425760. Its totient is φ = 254023281600.

The previous prime is 256923698641. The next prime is 256923698663. The reversal of 256923698659 is 956896329652.

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 256923698659 - 2¹³ = 256923690467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256923198659) 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, 1861194 + ... + 1994464.

It is an arithmetic number, because the mean of its divisors is an integer number (32478053220).

Almost surely, 2^256923698659 is an apocalyptic number.

256923698659 is a deficient number, since it is larger than the sum of its proper divisors (2900727101).

256923698659 is a wasteful number, since it uses less digits than its factorization.

256923698659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155021.

The product of its digits is 377913600, while the sum is 70.

The spelling of 256923698659 in words is "two hundred fifty-six billion, nine hundred twenty-three million, six hundred ninety-eight thousand, six hundred fifty-nine".