86436357121 has 4 divisors (see below), whose sum is σ = 87853346644. Its totient is φ = 85019367600.

The previous prime is 86436357097. The next prime is 86436357127. The reversal of 86436357121 is 12175363468.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16367620096 + 70068737025 = 127936^2 + 264705^2 .

It is a cyclic number.

It is not a de Polignac number, because 86436357121 - 2¹⁷ = 86436226049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86436357127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 708494670 + ... + 708494791.

It is an arithmetic number, because the mean of its divisors is an integer number (21963336661).

Almost surely, 2^86436357121 is an apocalyptic number.

It is an amenable number.

86436357121 is a deficient number, since it is larger than the sum of its proper divisors (1416989523).

86436357121 is a wasteful number, since it uses less digits than its factorization.

86436357121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1416989522.

The product of its digits is 725760, while the sum is 46.

The spelling of 86436357121 in words is "eighty-six billion, four hundred thirty-six million, three hundred fifty-seven thousand, one hundred twenty-one".