256656130 has 16 divisors (see below), whose sum is σ = 476884224. Its totient is φ = 99350640.

The previous prime is 256656091. The next prime is 256656137. The reversal of 256656130 is 31656652.

It is not an unprimeable number, because it can be changed into a prime (256656137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 413652 + ... + 414271.

It is an arithmetic number, because the mean of its divisors is an integer number (29805264).

Almost surely, 2^256656130 is an apocalyptic number.

256656130 is a deficient number, since it is larger than the sum of its proper divisors (220228094).

256656130 is a wasteful number, since it uses less digits than its factorization.

256656130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 827961.

The product of its (nonzero) digits is 32400, while the sum is 34.

The square root of 256656130 is about 16020.4909412914. The cubic root of 256656130 is about 635.5024275012.

The spelling of 256656130 in words is "two hundred fifty-six million, six hundred fifty-six thousand, one hundred thirty".