84554191897 has 8 divisors (see below), whose sum is σ = 98605472000. Its totient is φ = 72475021332.

The previous prime is 84554191867. The next prime is 84554191993. The reversal of 84554191897 is 79819145548.

It is a de Polignac number, because none of the positive numbers 2^k-84554191897 is a prime.

It is a super-2 number, since 2×84554191897² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (84554191867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123256497 + ... + 123257182.

It is an arithmetic number, because the mean of its divisors is an integer number (12325684000).

Almost surely, 2^84554191897 is an apocalyptic number.

It is an amenable number.

84554191897 is a deficient number, since it is larger than the sum of its proper divisors (14051280103).

84554191897 is an equidigital number, since it uses as much as digits as its factorization.

84554191897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246513700 (or 246513686 counting only the distinct ones).

The product of its digits is 14515200, while the sum is 61.

The spelling of 84554191897 in words is "eighty-four billion, five hundred fifty-four million, one hundred ninety-one thousand, eight hundred ninety-seven".