256161495 has 16 divisors (see below), whose sum is σ = 423992160. Its totient is φ = 131908224.

The previous prime is 256161487. The next prime is 256161533. The reversal of 256161495 is 594161652.

It is not a de Polignac number, because 256161495 - 2³ = 256161487 is a prime.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 294004 + ... + 294873.

It is an arithmetic number, because the mean of its divisors is an integer number (26499510).

Almost surely, 2^256161495 is an apocalyptic number.

256161495 is a deficient number, since it is larger than the sum of its proper divisors (167830665).

256161495 is a wasteful number, since it uses less digits than its factorization.

256161495 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 588914.

The product of its digits is 64800, while the sum is 39.

The square root of 256161495 is about 16005.0459230831. The cubic root of 256161495 is about 635.0939121649.

The spelling of 256161495 in words is "two hundred fifty-six million, one hundred sixty-one thousand, four hundred ninety-five".