256022065515 has 32 divisors (see below), whose sum is σ = 410673162240. Its totient is φ = 136199556864.

The previous prime is 256022065513. The next prime is 256022065529. The reversal of 256022065515 is 515560220652.

It is not a de Polignac number, because 256022065515 - 2¹ = 256022065513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (256022065513) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10795791 + ... + 10819479.

It is an arithmetic number, because the mean of its divisors is an integer number (12833536320).

Almost surely, 2^256022065515 is an apocalyptic number.

256022065515 is a deficient number, since it is larger than the sum of its proper divisors (154651096725).

256022065515 is a wasteful number, since it uses less digits than its factorization.

256022065515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25491.

The product of its (nonzero) digits is 180000, while the sum is 39.

The spelling of 256022065515 in words is "two hundred fifty-six billion, twenty-two million, sixty-five thousand, five hundred fifteen".