85019889921 has 8 divisors (see below), whose sum is σ = 113423296224. Its totient is φ = 56648205120.

The previous prime is 85019889917. The next prime is 85019889953. The reversal of 85019889921 is 12998891058.

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

It is not a de Polignac number, because 85019889921 - 2² = 85019889917 is a prime.

It is not an unprimeable number, because it can be changed into a prime (85019889961) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7924120 + ... + 7934841.

It is an arithmetic number, because the mean of its divisors is an integer number (14177912028).

Almost surely, 2^85019889921 is an apocalyptic number.

It is an amenable number.

85019889921 is a deficient number, since it is larger than the sum of its proper divisors (28403406303).

85019889921 is a wasteful number, since it uses less digits than its factorization.

85019889921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15860751.

The product of its (nonzero) digits is 3732480, while the sum is 60.

The spelling of 85019889921 in words is "eighty-five billion, nineteen million, eight hundred eighty-nine thousand, nine hundred twenty-one".