256693753 has 8 divisors (see below), whose sum is σ = 263914560. Its totient is φ = 249487920.

The previous prime is 256693747. The next prime is 256693757. The reversal of 256693753 is 357396652.

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 256693753 - 2⁵ = 256693721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256693757) 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, 37188 + ... + 43546.

It is an arithmetic number, because the mean of its divisors is an integer number (32989320).

Almost surely, 2^256693753 is an apocalyptic number.

It is an amenable number.

256693753 is a deficient number, since it is larger than the sum of its proper divisors (7220807).

256693753 is a wasteful number, since it uses less digits than its factorization.

256693753 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7487.

The product of its digits is 1020600, while the sum is 46.

The square root of 256693753 is about 16021.6651132147. The cubic root of 256693753 is about 635.5334785677.

The spelling of 256693753 in words is "two hundred fifty-six million, six hundred ninety-three thousand, seven hundred fifty-three".