256622327565545 has 8 divisors (see below), whose sum is σ = 307947118967880. Its totient is φ = 205297644792960.

The previous prime is 256622327565449. The next prime is 256622327565547. The reversal of 256622327565545 is 545565723226652.

256622327565545 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 22718216247769 + 233904111317776 = 4766363^2 + 15293924^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 256622327565545 - 2²⁴ = 256622310788329 is a prime.

It is a super-2 number, since 2×256622327565545² (a number of 30 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (256622327565547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21866540 + ... + 31486349.

It is an arithmetic number, because the mean of its divisors is an integer number (38493389870985).

Almost surely, 2^{256622327565545} is an apocalyptic number.

It is an amenable number.

256622327565545 is a deficient number, since it is larger than the sum of its proper divisors (51324791402335).

256622327565545 is an equidigital number, since it uses as much as digits as its factorization.

256622327565545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54314875.

The product of its digits is 907200000, while the sum is 65.

The spelling of 256622327565545 in words is "two hundred fifty-six trillion, six hundred twenty-two billion, three hundred twenty-seven million, five hundred sixty-five thousand, five hundred forty-five".