86212923578 has 4 divisors (see below), whose sum is σ = 129319385370. Its totient is φ = 43106461788.

The previous prime is 86212923541. The next prime is 86212923583. The reversal of 86212923578 is 87532921268.

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

It can be written as a sum of positive squares in only one way, i.e., 43992126049 + 42220797529 = 209743^2 + 205477^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21553230893 + ... + 21553230896.

Almost surely, 2^86212923578 is an apocalyptic number.

86212923578 is a deficient number, since it is larger than the sum of its proper divisors (43106461792).

86212923578 is a wasteful number, since it uses less digits than its factorization.

86212923578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43106461791.

The product of its digits is 2903040, while the sum is 53.

The spelling of 86212923578 in words is "eighty-six billion, two hundred twelve million, nine hundred twenty-three thousand, five hundred seventy-eight".