256930414465 has 4 divisors (see below), whose sum is σ = 308316497364. Its totient is φ = 205544331568.

The previous prime is 256930414453. The next prime is 256930414471. The reversal of 256930414465 is 564414039652.

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

It can be written as a sum of positive squares in 2 ways, for example, as 113434913601 + 143495500864 = 336801^2 + 378808^2 .

It is a cyclic number.

It is not a de Polignac number, because 256930414465 - 2⁷ = 256930414337 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25693041442 + ... + 25693041451.

It is an arithmetic number, because the mean of its divisors is an integer number (77079124341).

Almost surely, 2^256930414465 is an apocalyptic number.

It is an amenable number.

256930414465 is a deficient number, since it is larger than the sum of its proper divisors (51386082899).

256930414465 is an equidigital number, since it uses as much as digits as its factorization.

256930414465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51386082898.

The product of its (nonzero) digits is 3110400, while the sum is 49.

The spelling of 256930414465 in words is "two hundred fifty-six billion, nine hundred thirty million, four hundred fourteen thousand, four hundred sixty-five".