84655455591 has 24 divisors (see below), whose sum is σ = 133779754224. Its totient is φ = 47461814400.

The previous prime is 84655455439. The next prime is 84655455593. The reversal of 84655455591 is 19555455648.

It is not a de Polignac number, because 84655455591 - 2¹¹ = 84655453543 is a prime.

It is a super-2 number, since 2×84655455591² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84655455593) 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, 5425110 + ... + 5440691.

It is an arithmetic number, because the mean of its divisors is an integer number (5574156426).

Almost surely, 2^84655455591 is an apocalyptic number.

84655455591 is a deficient number, since it is larger than the sum of its proper divisors (49124298633).

84655455591 is a wasteful number, since it uses less digits than its factorization.

84655455591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10865871 (or 10865864 counting only the distinct ones).

The product of its digits is 21600000, while the sum is 57.

Adding to 84655455591 its sum of digits (57), we get a palindrome (84655455648).

The spelling of 84655455591 in words is "eighty-four billion, six hundred fifty-five million, four hundred fifty-five thousand, five hundred ninety-one".