85223620208895 has 128 divisors (see below), whose sum is σ = 173816541480960. Its totient is φ = 34712223252480.

The previous prime is 85223620208851. The next prime is 85223620208927. The reversal of 85223620208895 is 59880202632258.

It is a Cunningham number, because it is equal to 9231664²-1.

It is not a de Polignac number, because 85223620208895 - 2¹⁴ = 85223620192511 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 45235149 + ... + 47081481.

It is an arithmetic number, because the mean of its divisors is an integer number (1357941730320).

Almost surely, 2^{85223620208895} is an apocalyptic number.

85223620208895 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

85223620208895 is an abundant number, since it is smaller than the sum of its proper divisors (88592921272065).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

85223620208895 is a wasteful number, since it uses less digits than its factorization.

85223620208895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1847745.

The product of its (nonzero) digits is 33177600, while the sum is 60.

The spelling of 85223620208895 in words is "eighty-five trillion, two hundred twenty-three billion, six hundred twenty million, two hundred eight thousand, eight hundred ninety-five".