86181698437 has 2 divisors, whose sum is σ = 86181698438. Its totient is φ = 86181698436.

The previous prime is 86181698431. The next prime is 86181698507. The reversal of 86181698437 is 73489618168.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84119721156 + 2061977281 = 290034^2 + 45409^2 .

It is a cyclic number.

It is not a de Polignac number, because 86181698437 - 2²³ = 86173309829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86181698431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43090849218 + 43090849219.

It is an arithmetic number, because the mean of its divisors is an integer number (43090849219).

Almost surely, 2^86181698437 is an apocalyptic number.

It is an amenable number.

86181698437 is a deficient number, since it is larger than the sum of its proper divisors (1).

86181698437 is an equidigital number, since it uses as much as digits as its factorization.

86181698437 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13934592, while the sum is 61.

The spelling of 86181698437 in words is "eighty-six billion, one hundred eighty-one million, six hundred ninety-eight thousand, four hundred thirty-seven".