56263128493 has 24 divisors (see below), whose sum is σ = 66667979000. Its totient is φ = 47165690880.

The previous prime is 56263128463. The next prime is 56263128553. The reversal of 56263128493 is 39482136265.

It can be written as a sum of positive squares in 4 ways, for example, as 28697449 + 56234431044 = 5357^2 + 237138^2 .

It is not a de Polignac number, because 56263128493 - 2²⁵ = 56229574061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56263128463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1569433 + ... + 1604881.

Almost surely, 2^56263128493 is an apocalyptic number.

It is an amenable number.

56263128493 is a deficient number, since it is larger than the sum of its proper divisors (10404850507).

56263128493 is a wasteful number, since it uses less digits than its factorization.

56263128493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36493 (or 36482 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 49.

The spelling of 56263128493 in words is "fifty-six billion, two hundred sixty-three million, one hundred twenty-eight thousand, four hundred ninety-three".