256623314465145 has 32 divisors (see below), whose sum is σ = 444000087525888. Its totient is φ = 126074098915328.

The previous prime is 256623314465093. The next prime is 256623314465149. The reversal of 256623314465145 is 541564413326652.

It is a cyclic number.

It is not a de Polignac number, because 256623314465145 - 2²⁵ = 256623280910713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (256623314465149) 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, 10706008644 + ... + 10706032613.

It is an arithmetic number, because the mean of its divisors is an integer number (13875002735184).

Almost surely, 2^{256623314465145} is an apocalyptic number.

It is an amenable number.

256623314465145 is a deficient number, since it is larger than the sum of its proper divisors (187376773060743).

256623314465145 is a wasteful number, since it uses less digits than its factorization.

256623314465145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21412041329.

The product of its digits is 62208000, while the sum is 57.

The spelling of 256623314465145 in words is "two hundred fifty-six trillion, six hundred twenty-three billion, three hundred fourteen million, four hundred sixty-five thousand, one hundred forty-five".