85204197955 has 4 divisors (see below), whose sum is σ = 102245037552. Its totient is φ = 68163358360.

The previous prime is 85204197917. The next prime is 85204197961. The reversal of 85204197955 is 55979140258.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 85204197955 - 2²¹ = 85202100803 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 85204197896 and 85204197905.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8520419791 + ... + 8520419800.

It is an arithmetic number, because the mean of its divisors is an integer number (25561259388).

Almost surely, 2^85204197955 is an apocalyptic number.

85204197955 is a deficient number, since it is larger than the sum of its proper divisors (17040839597).

85204197955 is a wasteful number, since it uses less digits than its factorization.

85204197955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17040839596.

The product of its (nonzero) digits is 4536000, while the sum is 55.

The spelling of 85204197955 in words is "eighty-five billion, two hundred four million, one hundred ninety-seven thousand, nine hundred fifty-five".