256624453 has 8 divisors (see below), whose sum is σ = 267341760. Its totient is φ = 246119520.

The previous prime is 256624447. The next prime is 256624471. The reversal of 256624453 is 354426652.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256624453 is a prime.

It is a super-2 number, since 2×256624453² = 131712219755098418, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256624493) 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, 50625 + ... + 55462.

It is an arithmetic number, because the mean of its divisors is an integer number (33417720).

Almost surely, 2^256624453 is an apocalyptic number.

It is an amenable number.

256624453 is a deficient number, since it is larger than the sum of its proper divisors (10717307).

256624453 is a wasteful number, since it uses less digits than its factorization.

256624453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106187.

The product of its digits is 172800, while the sum is 37.

The square root of 256624453 is about 16019.5022706700. The cubic root of 256624453 is about 635.4762814426.

The spelling of 256624453 in words is "two hundred fifty-six million, six hundred twenty-four thousand, four hundred fifty-three".