86538800891 has 2 divisors, whose sum is σ = 86538800892. Its totient is φ = 86538800890.

The previous prime is 86538800863. The next prime is 86538800897. The reversal of 86538800891 is 19800883568.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 86538800891 - 2⁶ = 86538800827 is a prime.

It is not a weakly prime, because it can be changed into another prime (86538800897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43269400445 + 43269400446.

It is an arithmetic number, because the mean of its divisors is an integer number (43269400446).

Almost surely, 2^86538800891 is an apocalyptic number.

86538800891 is a deficient number, since it is larger than the sum of its proper divisors (1).

86538800891 is an equidigital number, since it uses as much as digits as its factorization.

86538800891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3317760, while the sum is 56.

The spelling of 86538800891 in words is "eighty-six billion, five hundred thirty-eight million, eight hundred thousand, eight hundred ninety-one".