256008002505 has 32 divisors (see below), whose sum is σ = 456534403200. Its totient is φ = 121742502912.

The previous prime is 256008002501. The next prime is 256008002567. The reversal of 256008002505 is 505200800652.

It is not a de Polignac number, because 256008002505 - 2² = 256008002501 is a prime.

It is not an unprimeable number, because it can be changed into a prime (256008002501) 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, 26414970 + ... + 26424659.

It is an arithmetic number, because the mean of its divisors is an integer number (14266700100).

Almost surely, 2^256008002505 is an apocalyptic number.

It is an amenable number.

256008002505 is a deficient number, since it is larger than the sum of its proper divisors (200526400695).

256008002505 is a wasteful number, since it uses less digits than its factorization.

256008002505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52839673.

The product of its (nonzero) digits is 24000, while the sum is 33.

The spelling of 256008002505 in words is "two hundred fifty-six billion, eight million, two thousand, five hundred five".