11129561863 has 4 divisors (see below), whose sum is σ = 12719499280. Its totient is φ = 9539624448.

The previous prime is 11129561857. The next prime is 11129561869. The reversal of 11129561863 is 36816592111.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (11129561857) and next prime (11129561869).

It is a cyclic number.

It is not a de Polignac number, because 11129561863 - 2⁵ = 11129561831 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11129561869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 794968698 + ... + 794968711.

It is an arithmetic number, because the mean of its divisors is an integer number (3179874820).

Almost surely, 2^11129561863 is an apocalyptic number.

11129561863 is a deficient number, since it is larger than the sum of its proper divisors (1589937417).

11129561863 is an equidigital number, since it uses as much as digits as its factorization.

11129561863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1589937416.

The product of its digits is 77760, while the sum is 43.

The spelling of 11129561863 in words is "eleven billion, one hundred twenty-nine million, five hundred sixty-one thousand, eight hundred sixty-three".