36311890721 has 2 divisors, whose sum is σ = 36311890722. Its totient is φ = 36311890720.

The previous prime is 36311890661. The next prime is 36311890723. The reversal of 36311890721 is 12709811363.

36311890721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26851410496 + 9460480225 = 163864^2 + 97265^2 .

It is an emirp because it is prime and its reverse (12709811363) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 36311890721 - 2²² = 36307696417 is a prime.

Together with 36311890723, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (36311890723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18155945360 + 18155945361.

It is an arithmetic number, because the mean of its divisors is an integer number (18155945361).

Almost surely, 2^36311890721 is an apocalyptic number.

It is an amenable number.

36311890721 is a deficient number, since it is larger than the sum of its proper divisors (1).

36311890721 is an equidigital number, since it uses as much as digits as its factorization.

36311890721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 41.

The spelling of 36311890721 in words is "thirty-six billion, three hundred eleven million, eight hundred ninety thousand, seven hundred twenty-one".