84866138055 has 72 divisors (see below), whose sum is σ = 155520950832. Its totient is φ = 42805179648.

The previous prime is 84866138033. The next prime is 84866138081. The reversal of 84866138055 is 55083166848.

84866138055 is a `hidden beast` number, since 84 + 86 + 61 + 380 + 55 = 666.

It is not a de Polignac number, because 84866138055 - 2⁵ = 84866138023 is a prime.

It is a super-2 number, since 2×84866138055² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 84866137992 and 84866138010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 10018932 + ... + 10027398.

It is an arithmetic number, because the mean of its divisors is an integer number (2160013206).

Almost surely, 2^84866138055 is an apocalyptic number.

84866138055 is a deficient number, since it is larger than the sum of its proper divisors (70654812777).

84866138055 is a wasteful number, since it uses less digits than its factorization.

84866138055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9133 (or 9111 counting only the distinct ones).

The product of its (nonzero) digits is 5529600, while the sum is 54.

The spelling of 84866138055 in words is "eighty-four billion, eight hundred sixty-six million, one hundred thirty-eight thousand, fifty-five".