11678717811 has 4 divisors (see below), whose sum is σ = 15571623752. Its totient is φ = 7785811872.

The previous prime is 11678717759. The next prime is 11678717837. The reversal of 11678717811 is 11871787611.

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

It is not a de Polignac number, because 11678717811 - 2¹⁰ = 11678716787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11678717411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1946452966 + ... + 1946452971.

It is an arithmetic number, because the mean of its divisors is an integer number (3892905938).

Almost surely, 2^11678717811 is an apocalyptic number.

11678717811 is a deficient number, since it is larger than the sum of its proper divisors (3892905941).

11678717811 is an equidigital number, since it uses as much as digits as its factorization.

11678717811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3892905940.

The product of its digits is 131712, while the sum is 48.

The spelling of 11678717811 in words is "eleven billion, six hundred seventy-eight million, seven hundred seventeen thousand, eight hundred eleven".