256346465 has 8 divisors (see below), whose sum is σ = 308712168. Its totient is φ = 204346240.

The previous prime is 256346411. The next prime is 256346483. The reversal of 256346465 is 564643652.

It is a happy number.

256346465 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 13017664 + 243328801 = 3608^2 + 15599^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 256346465 - 2⁶ = 256346401 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89822 + ... + 92631.

It is an arithmetic number, because the mean of its divisors is an integer number (38589021).

Almost surely, 2^256346465 is an apocalyptic number.

It is an amenable number.

256346465 is a deficient number, since it is larger than the sum of its proper divisors (52365703).

256346465 is a wasteful number, since it uses less digits than its factorization.

256346465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182739.

The product of its digits is 518400, while the sum is 41.

The square root of 256346465 is about 16010.8233704579. The cubic root of 256346465 is about 635.2467390070.

The spelling of 256346465 in words is "two hundred fifty-six million, three hundred forty-six thousand, four hundred sixty-five".