2855513047817 has 2 divisors, whose sum is σ = 2855513047818. Its totient is φ = 2855513047816.

The previous prime is 2855513047787. The next prime is 2855513047867. The reversal of 2855513047817 is 7187403155582.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1640394846841 + 1215118200976 = 1280779^2 + 1102324^2 .

It is a cyclic number.

It is not a de Polignac number, because 2855513047817 - 2⁸ = 2855513047561 is a prime.

It is not a weakly prime, because it can be changed into another prime (2855513047867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1427756523908 + 1427756523909.

It is an arithmetic number, because the mean of its divisors is an integer number (1427756523909).

Almost surely, 2^{2855513047817} is an apocalyptic number.

It is an amenable number.

2855513047817 is a deficient number, since it is larger than the sum of its proper divisors (1).

2855513047817 is an equidigital number, since it uses as much as digits as its factorization.

2855513047817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9408000, while the sum is 56.

The spelling of 2855513047817 in words is "two trillion, eight hundred fifty-five billion, five hundred thirteen million, forty-seven thousand, eight hundred seventeen".