256569379 has 8 divisors (see below), whose sum is σ = 280163520. Its totient is φ = 233020200.

The previous prime is 256569329. The next prime is 256569461. The reversal of 256569379 is 973965652.

256569379 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 256569379 - 2¹⁵ = 256536611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256569319) 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, 1312 + ... + 22690.

It is an arithmetic number, because the mean of its divisors is an integer number (35020440).

Almost surely, 2^256569379 is an apocalyptic number.

256569379 is a deficient number, since it is larger than the sum of its proper divisors (23594141).

256569379 is a wasteful number, since it uses less digits than its factorization.

256569379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22481.

The product of its digits is 3061800, while the sum is 52.

The square root of 256569379 is about 16017.7832111688. The cubic root of 256569379 is about 635.4308184788.

The spelling of 256569379 in words is "two hundred fifty-six million, five hundred sixty-nine thousand, three hundred seventy-nine".