7256561476563 has 80 divisors (see below), whose sum is σ = 12678964083456. Its totient is φ = 4049461563840.

The previous prime is 7256561476537. The next prime is 7256561476573. The reversal of 7256561476563 is 3656741656527.

7256561476563 is a `hidden beast` number, since 7 + 2 + 5 + 6 + 5 + 61 + 4 + 7 + 6 + 563 = 666.

It is not a de Polignac number, because 7256561476563 - 2¹⁰ = 7256561475539 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 7256561476563.

It is not an unprimeable number, because it can be changed into a prime (7256561476523) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 158234145 + ... + 158279997.

Almost surely, 2^{7256561476563} is an apocalyptic number.

7256561476563 is a deficient number, since it is larger than the sum of its proper divisors (5422402606893).

7256561476563 is a wasteful number, since it uses less digits than its factorization.

7256561476563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52406 (or 52397 counting only the distinct ones).

The product of its digits is 190512000, while the sum is 63.

The spelling of 7256561476563 in words is "seven trillion, two hundred fifty-six billion, five hundred sixty-one million, four hundred seventy-six thousand, five hundred sixty-three".