86635781653 has 2 divisors, whose sum is σ = 86635781654. Its totient is φ = 86635781652.

The previous prime is 86635781627. The next prime is 86635781689. The reversal of 86635781653 is 35618753668.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83927828209 + 2707953444 = 289703^2 + 52038^2 .

It is a cyclic number.

It is not a de Polignac number, because 86635781653 - 2⁵ = 86635781621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86635781693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43317890826 + 43317890827.

It is an arithmetic number, because the mean of its divisors is an integer number (43317890827).

Almost surely, 2^86635781653 is an apocalyptic number.

It is an amenable number.

86635781653 is a deficient number, since it is larger than the sum of its proper divisors (1).

86635781653 is an equidigital number, since it uses as much as digits as its factorization.

86635781653 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21772800, while the sum is 58.

The spelling of 86635781653 in words is "eighty-six billion, six hundred thirty-five million, seven hundred eighty-one thousand, six hundred fifty-three".