86578787862 has 72 divisors (see below), whose sum is σ = 219019705632. Its totient is φ = 24645448800.

The previous prime is 86578787767. The next prime is 86578787863. The reversal of 86578787862 is 26878787568.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86578787863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 57912 + ... + 420132.

It is an arithmetic number, because the mean of its divisors is an integer number (3041940356).

Almost surely, 2^86578787862 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 86578787862, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109509852816).

86578787862 is an abundant number, since it is smaller than the sum of its proper divisors (132440917770).

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

86578787862 is a wasteful number, since it uses less digits than its factorization.

86578787862 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362514 (or 362504 counting only the distinct ones).

The product of its digits is 505774080, while the sum is 72.

The spelling of 86578787862 in words is "eighty-six billion, five hundred seventy-eight million, seven hundred eighty-seven thousand, eight hundred sixty-two".