256618153 has 8 divisors (see below), whose sum is σ = 292118976. Its totient is φ = 223146000.

The previous prime is 256618151. The next prime is 256618163. The reversal of 256618153 is 351816652.

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

It is not a de Polignac number, because 256618153 - 2¹ = 256618151 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256618151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 506898 + ... + 507403.

It is an arithmetic number, because the mean of its divisors is an integer number (36514872).

Almost surely, 2^256618153 is an apocalyptic number.

256618153 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

256618153 is a deficient number, since it is larger than the sum of its proper divisors (35500823).

256618153 is a wasteful number, since it uses less digits than its factorization.

256618153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1014335.

The product of its digits is 43200, while the sum is 37.

The square root of 256618153 is about 16019.3056341403. The cubic root of 256618153 is about 635.4710811934.

The spelling of 256618153 in words is "two hundred fifty-six million, six hundred eighteen thousand, one hundred fifty-three".