84633541991 has 16 divisors (see below), whose sum is σ = 88535409600. Its totient is φ = 80750469888.

The previous prime is 84633541969. The next prime is 84633542009. The reversal of 84633541991 is 19914533648.

It is a cyclic number.

It is not a de Polignac number, because 84633541991 - 2³⁴ = 67453672807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84633540991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18408305 + ... + 18412901.

It is an arithmetic number, because the mean of its divisors is an integer number (5533463100).

Almost surely, 2^84633541991 is an apocalyptic number.

84633541991 is a deficient number, since it is larger than the sum of its proper divisors (3901867609).

84633541991 is a wasteful number, since it uses less digits than its factorization.

84633541991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6458.

The product of its digits is 2799360, while the sum is 53.

The spelling of 84633541991 in words is "eighty-four billion, six hundred thirty-three million, five hundred forty-one thousand, nine hundred ninety-one".