11811736819 has 2 divisors, whose sum is σ = 11811736820. Its totient is φ = 11811736818.

The previous prime is 11811736817. The next prime is 11811736831. The reversal of 11811736819 is 91863711811.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11811736819 - 2¹ = 11811736817 is a prime.

It is a super-2 number, since 2×11811736819² (a number of 21 digits) contains 22 as substring.

Together with 11811736817, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (11811736817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5905868409 + 5905868410.

It is an arithmetic number, because the mean of its divisors is an integer number (5905868410).

Almost surely, 2^11811736819 is an apocalyptic number.

11811736819 is a deficient number, since it is larger than the sum of its proper divisors (1).

11811736819 is an equidigital number, since it uses as much as digits as its factorization.

11811736819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 46.

The spelling of 11811736819 in words is "eleven billion, eight hundred eleven million, seven hundred thirty-six thousand, eight hundred nineteen".