84086686440 has 80 divisors (see below), whose sum is σ = 282624706980. Its totient is φ = 22423115520.

The previous prime is 84086686427. The next prime is 84086686451. The reversal of 84086686440 is 4468668048.

84086686440 is a `hidden beast` number, since 8 + 40 + 86 + 6 + 86 + 440 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 78616308996 + 5470377444 = 280386^2 + 73962^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 12973101 + ... + 12979580.

Almost surely, 2^84086686440 is an apocalyptic number.

It is an amenable number.

84086686440 is an abundant number, since it is smaller than the sum of its proper divisors (198538020540).

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

84086686440 is a wasteful number, since it uses less digits than its factorization.

84086686440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25952704 (or 25952691 counting only the distinct ones).

The product of its (nonzero) digits is 7077888, while the sum is 54.

The spelling of 84086686440 in words is "eighty-four billion, eighty-six million, six hundred eighty-six thousand, four hundred forty".