56815136453 has 2 divisors, whose sum is σ = 56815136454. Its totient is φ = 56815136452.

The previous prime is 56815136423. The next prime is 56815136489. The reversal of 56815136453 is 35463151865.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56740192804 + 74943649 = 238202^2 + 8657^2 .

It is a cyclic number.

It is not a de Polignac number, because 56815136453 - 2²⁸ = 56546700997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 56815136398 and 56815136407.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56815136423) 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 as a sum of consecutive naturals, namely, 28407568226 + 28407568227.

It is an arithmetic number, because the mean of its divisors is an integer number (28407568227).

Almost surely, 2^56815136453 is an apocalyptic number.

It is an amenable number.

56815136453 is a deficient number, since it is larger than the sum of its proper divisors (1).

56815136453 is an equidigital number, since it uses as much as digits as its factorization.

56815136453 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296000, while the sum is 47.

The spelling of 56815136453 in words is "fifty-six billion, eight hundred fifteen million, one hundred thirty-six thousand, four hundred fifty-three".