86642802909 has 12 divisors (see below), whose sum is σ = 134777693596. Its totient is φ = 53318647872.

The previous prime is 86642802889. The next prime is 86642802913. The reversal of 86642802909 is 90920824668.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 55920425625 + 30722377284 = 236475^2 + 175278^2 .

It is not a de Polignac number, because 86642802909 - 2¹³ = 86642794717 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86642802979) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 370268272 + ... + 370268505.

Almost surely, 2^86642802909 is an apocalyptic number.

It is an amenable number.

86642802909 is a deficient number, since it is larger than the sum of its proper divisors (48134890687).

86642802909 is a wasteful number, since it uses less digits than its factorization.

86642802909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 740536796 (or 740536793 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 54.

The spelling of 86642802909 in words is "eighty-six billion, six hundred forty-two million, eight hundred two thousand, nine hundred nine".