256632701 has 8 divisors (see below), whose sum is σ = 276718680. Its totient is φ = 236596032.

The previous prime is 256632667. The next prime is 256632721. The reversal of 256632701 is 107236652.

It can be written as a sum of positive squares in 4 ways, for example, as 14830201 + 241802500 = 3851^2 + 15550^2 .

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-256632701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256632721) 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, 1130 + ... + 22683.

It is an arithmetic number, because the mean of its divisors is an integer number (34589835).

Almost surely, 2^256632701 is an apocalyptic number.

It is an amenable number.

256632701 is a deficient number, since it is larger than the sum of its proper divisors (20085979).

256632701 is a wasteful number, since it uses less digits than its factorization.

256632701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24655.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 256632701 is about 16019.7597048146. The cubic root of 256632701 is about 635.4830895133.

The spelling of 256632701 in words is "two hundred fifty-six million, six hundred thirty-two thousand, seven hundred one".