2256645136065 has 32 divisors (see below), whose sum is σ = 3802425283200. Its totient is φ = 1139671710720.

The previous prime is 2256645136019. The next prime is 2256645136069. The reversal of 2256645136065 is 5606315466522.

It is not a de Polignac number, because 2256645136065 - 2¹⁶ = 2256645070529 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2256645135999 and 2256645136017.

It is not an unprimeable number, because it can be changed into a prime (2256645136069) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 1216150 + ... + 2447919.

It is an arithmetic number, because the mean of its divisors is an integer number (118825790100).

Almost surely, 2^{2256645136065} is an apocalyptic number.

It is an amenable number.

2256645136065 is a deficient number, since it is larger than the sum of its proper divisors (1545780147135).

2256645136065 is a wasteful number, since it uses less digits than its factorization.

2256645136065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3666257.

The product of its (nonzero) digits is 7776000, while the sum is 51.

The spelling of 2256645136065 in words is "two trillion, two hundred fifty-six billion, six hundred forty-five million, one hundred thirty-six thousand, sixty-five".