85720223218 has 8 divisors (see below), whose sum is σ = 146948954112. Its totient is φ = 36737238516.

The previous prime is 85720223179. The next prime is 85720223249. The reversal of 85720223218 is 81232202758.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3061436530 + ... + 3061436557.

It is an arithmetic number, because the mean of its divisors is an integer number (18368619264).

Almost surely, 2^85720223218 is an apocalyptic number.

85720223218 is a deficient number, since it is larger than the sum of its proper divisors (61228730894).

85720223218 is a wasteful number, since it uses less digits than its factorization.

85720223218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6122873096.

The product of its (nonzero) digits is 107520, while the sum is 40.

The spelling of 85720223218 in words is "eighty-five billion, seven hundred twenty million, two hundred twenty-three thousand, two hundred eighteen".