56455555517 has 2 divisors, whose sum is σ = 56455555518. Its totient is φ = 56455555516.

The previous prime is 56455555511. The next prime is 56455555537. The reversal of 56455555517 is 71555555465.

56455555517 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55426814041 + 1028741476 = 235429^2 + 32074^2 .

It is a cyclic number.

It is not a de Polignac number, because 56455555517 - 2¹² = 56455551421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56455555511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28227777758 + 28227777759.

It is an arithmetic number, because the mean of its divisors is an integer number (28227777759).

Almost surely, 2^56455555517 is an apocalyptic number.

It is an amenable number.

56455555517 is a deficient number, since it is larger than the sum of its proper divisors (1).

56455555517 is an equidigital number, since it uses as much as digits as its factorization.

56455555517 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13125000, while the sum is 53.

The spelling of 56455555517 in words is "fifty-six billion, four hundred fifty-five million, five hundred fifty-five thousand, five hundred seventeen".