4256623475865 has 24 divisors (see below), whose sum is σ = 7378808348808. Its totient is φ = 2269995805440.

The previous prime is 4256623475849. The next prime is 4256623475873. The reversal of 4256623475865 is 5685743266524.

4256623475865 is a `hidden beast` number, since 4 + 2 + 5 + 6 + 6 + 2 + 3 + 47 + 586 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 2528710596864 + 1727912879001 = 1590192^2 + 1314501^2 .

It is not a de Polignac number, because 4256623475865 - 2⁴ = 4256623475849 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3728566 + ... + 4734495.

It is an arithmetic number, because the mean of its divisors is an integer number (307450347867).

Almost surely, 2^{4256623475865} is an apocalyptic number.

4256623475865 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

4256623475865 is a deficient number, since it is larger than the sum of its proper divisors (3122184872943).

4256623475865 is a wasteful number, since it uses less digits than its factorization.

4256623475865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8474249 (or 8474246 counting only the distinct ones).

The product of its digits is 290304000, while the sum is 63.

The spelling of 4256623475865 in words is "four trillion, two hundred fifty-six billion, six hundred twenty-three million, four hundred seventy-five thousand, eight hundred sixty-five".