11315306861 has 4 divisors (see below), whose sum is σ = 11316530400. Its totient is φ = 11314083324.

The previous prime is 11315306851. The next prime is 11315306881. The reversal of 11315306861 is 16860351311.

11315306861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11315306861 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 (11315306851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 597791 + ... + 616428.

It is an arithmetic number, because the mean of its divisors is an integer number (2829132600).

Almost surely, 2^11315306861 is an apocalyptic number.

It is an amenable number.

11315306861 is a deficient number, since it is larger than the sum of its proper divisors (1223539).

11315306861 is an equidigital number, since it uses as much as digits as its factorization.

11315306861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1223538.

The product of its (nonzero) digits is 12960, while the sum is 35.

The spelling of 11315306861 in words is "eleven billion, three hundred fifteen million, three hundred six thousand, eight hundred sixty-one".