56147541917 has 2 divisors, whose sum is σ = 56147541918. Its totient is φ = 56147541916.

The previous prime is 56147541913. The next prime is 56147541937. The reversal of 56147541917 is 71914574165.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44398282681 + 11749259236 = 210709^2 + 108394^2 .

It is a cyclic number.

It is not a de Polignac number, because 56147541917 - 2² = 56147541913 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56147541913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28073770958 + 28073770959.

It is an arithmetic number, because the mean of its divisors is an integer number (28073770959).

Almost surely, 2^56147541917 is an apocalyptic number.

It is an amenable number.

56147541917 is a deficient number, since it is larger than the sum of its proper divisors (1).

56147541917 is an equidigital number, since it uses as much as digits as its factorization.

56147541917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1058400, while the sum is 50.

The spelling of 56147541917 in words is "fifty-six billion, one hundred forty-seven million, five hundred forty-one thousand, nine hundred seventeen".