11171531863 has 2 divisors, whose sum is σ = 11171531864. Its totient is φ = 11171531862.

The previous prime is 11171531843. The next prime is 11171531909. The reversal of 11171531863 is 36813517111.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11171531863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11171531843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5585765931 + 5585765932.

It is an arithmetic number, because the mean of its divisors is an integer number (5585765932).

Almost surely, 2^11171531863 is an apocalyptic number.

11171531863 is a deficient number, since it is larger than the sum of its proper divisors (1).

11171531863 is an equidigital number, since it uses as much as digits as its factorization.

11171531863 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15120, while the sum is 37.

The spelling of 11171531863 in words is "eleven billion, one hundred seventy-one million, five hundred thirty-one thousand, eight hundred sixty-three".