86844978892 has 72 divisors (see below), whose sum is σ = 182648997888. Its totient is φ = 35988170400.

The previous prime is 86844978877. The next prime is 86844978929. The reversal of 86844978892 is 29887944868.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8057467 + ... + 8068237.

Almost surely, 2^86844978892 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 86844978892, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91324498944).

86844978892 is an abundant number, since it is smaller than the sum of its proper divisors (95804018996).

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

86844978892 is a wasteful number, since it uses less digits than its factorization.

86844978892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12147 (or 12138 counting only the distinct ones).

The product of its digits is 445906944, while the sum is 73.

The spelling of 86844978892 in words is "eighty-six billion, eight hundred forty-four million, nine hundred seventy-eight thousand, eight hundred ninety-two".