84055779855 has 24 divisors (see below), whose sum is σ = 145705395888. Its totient is φ = 44827069056.

The previous prime is 84055779851. The next prime is 84055779877. The reversal of 84055779855 is 55897755048.

84055779855 is a `hidden beast` number, since 8 + 4 + 0 + 5 + 577 + 9 + 8 + 55 = 666.

It is not a de Polignac number, because 84055779855 - 2² = 84055779851 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 84055779792 and 84055779801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84055779851) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 876139 + ... + 967331.

It is an arithmetic number, because the mean of its divisors is an integer number (6071058162).

Almost surely, 2^84055779855 is an apocalyptic number.

84055779855 is a deficient number, since it is larger than the sum of its proper divisors (61649616033).

84055779855 is a wasteful number, since it uses less digits than its factorization.

84055779855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111687 (or 111684 counting only the distinct ones).

The product of its (nonzero) digits is 70560000, while the sum is 63.

The spelling of 84055779855 in words is "eighty-four billion, fifty-five million, seven hundred seventy-nine thousand, eight hundred fifty-five".