86218339640 has 16 divisors (see below), whose sum is σ = 193991264280. Its totient is φ = 34487335840.

The previous prime is 86218339637. The next prime is 86218339657. The reversal of 86218339640 is 4693381268.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1077729206 + ... + 1077729285.

Almost surely, 2^86218339640 is an apocalyptic number.

It is an amenable number.

86218339640 is an abundant number, since it is smaller than the sum of its proper divisors (107772924640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

86218339640 is a wasteful number, since it uses less digits than its factorization.

86218339640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2155458502 (or 2155458498 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 50.

The spelling of 86218339640 in words is "eighty-six billion, two hundred eighteen million, three hundred thirty-nine thousand, six hundred forty".