863561056511 has 2 divisors, whose sum is σ = 863561056512. Its totient is φ = 863561056510.

The previous prime is 863561056487. The next prime is 863561056517. The reversal of 863561056511 is 115650165368.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-863561056511 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (863561056517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 431780528255 + 431780528256.

It is an arithmetic number, because the mean of its divisors is an integer number (431780528256).

Almost surely, 2^863561056511 is an apocalyptic number.

863561056511 is a deficient number, since it is larger than the sum of its proper divisors (1).

863561056511 is an equidigital number, since it uses as much as digits as its factorization.

863561056511 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648000, while the sum is 47.

The spelling of 863561056511 in words is "eight hundred sixty-three billion, five hundred sixty-one million, fifty-six thousand, five hundred eleven".