256911473 has 8 divisors (see below), whose sum is σ = 316198848. Its totient is φ = 203270544.

The previous prime is 256911469. The next prime is 256911481. The reversal of 256911473 is 374119652.

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 256911473 - 2² = 256911469 is a prime.

It is not an unprimeable number, because it can be changed into a prime (256911073) 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, 1411511 + ... + 1411692.

It is an arithmetic number, because the mean of its divisors is an integer number (39524856).

Almost surely, 2^256911473 is an apocalyptic number.

It is an amenable number.

256911473 is a deficient number, since it is larger than the sum of its proper divisors (59287375).

256911473 is a wasteful number, since it uses less digits than its factorization.

256911473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2823223.

The product of its digits is 45360, while the sum is 38.

The square root of 256911473 is about 16028.4582227986. The cubic root of 256911473 is about 635.7131079844.

The spelling of 256911473 in words is "two hundred fifty-six million, nine hundred eleven thousand, four hundred seventy-three".