256036323515 has 16 divisors (see below), whose sum is σ = 359301474048. Its totient is φ = 171484792416.

The previous prime is 256036323511. The next prime is 256036323523. The reversal of 256036323515 is 515323630652.

It is not a de Polignac number, because 256036323515 - 2² = 256036323511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256036323511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85060397 + ... + 85063406.

It is an arithmetic number, because the mean of its divisors is an integer number (22456342128).

Almost surely, 2^256036323515 is an apocalyptic number.

256036323515 is a deficient number, since it is larger than the sum of its proper divisors (103265150533).

256036323515 is a wasteful number, since it uses less digits than its factorization.

256036323515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170123858.

The product of its (nonzero) digits is 486000, while the sum is 41.

The spelling of 256036323515 in words is "two hundred fifty-six billion, thirty-six million, three hundred twenty-three thousand, five hundred fifteen".