84139638786 has 64 divisors (see below), whose sum is σ = 213827942400. Its totient is φ = 24024150288.

The previous prime is 84139638761. The next prime is 84139638797. The reversal of 84139638786 is 68783693148.

84139638786 is a `hidden beast` number, since 8 + 413 + 9 + 63 + 87 + 86 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 511125 + ... + 655383.

It is an arithmetic number, because the mean of its divisors is an integer number (3341061600).

Almost surely, 2^84139638786 is an apocalyptic number.

84139638786 is an abundant number, since it is smaller than the sum of its proper divisors (129688303614).

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

84139638786 is a wasteful number, since it uses less digits than its factorization.

84139638786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145820 (or 145814 counting only the distinct ones).

The product of its digits is 41803776, while the sum is 63.

The spelling of 84139638786 in words is "eighty-four billion, one hundred thirty-nine million, six hundred thirty-eight thousand, seven hundred eighty-six".