86621861801 has 2 divisors, whose sum is σ = 86621861802. Its totient is φ = 86621861800.

The previous prime is 86621861771. The next prime is 86621861813. The reversal of 86621861801 is 10816812668.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67587520576 + 19034341225 = 259976^2 + 137965^2 .

It is a cyclic number.

It is not a de Polignac number, because 86621861801 - 2¹⁸ = 86621599657 is a prime.

It is not a weakly prime, because it can be changed into another prime (86621861701) 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 as a sum of consecutive naturals, namely, 43310930900 + 43310930901.

It is an arithmetic number, because the mean of its divisors is an integer number (43310930901).

Almost surely, 2^86621861801 is an apocalyptic number.

It is an amenable number.

86621861801 is a deficient number, since it is larger than the sum of its proper divisors (1).

86621861801 is an equidigital number, since it uses as much as digits as its factorization.

86621861801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 221184, while the sum is 47.

The spelling of 86621861801 in words is "eighty-six billion, six hundred twenty-one million, eight hundred sixty-one thousand, eight hundred one".