256164665115 has 32 divisors (see below), whose sum is σ = 417008966400. Its totient is φ = 134241528960.

The previous prime is 256164665023. The next prime is 256164665131. The reversal of 256164665115 is 511566461652.

It is not a de Polignac number, because 256164665115 - 2²¹ = 256162567963 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1818021 + ... + 1953849.

It is an arithmetic number, because the mean of its divisors is an integer number (13031530200).

Almost surely, 2^256164665115 is an apocalyptic number.

256164665115 is a deficient number, since it is larger than the sum of its proper divisors (160844301285).

256164665115 is a wasteful number, since it uses less digits than its factorization.

256164665115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138027.

The product of its digits is 1296000, while the sum is 48.

The spelling of 256164665115 in words is "two hundred fifty-six billion, one hundred sixty-four million, six hundred sixty-five thousand, one hundred fifteen".