85804019690 has 32 divisors (see below), whose sum is σ = 156625921296. Its totient is φ = 33837834240.

The previous prime is 85804019663. The next prime is 85804019699. The reversal of 85804019690 is 9691040858.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 35038972969 + 50765046721 = 187187^2 + 225311^2 .

It is a super-2 number, since 2×85804019690² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (85804019699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1899770 + ... + 1944410.

Almost surely, 2^85804019690 is an apocalyptic number.

85804019690 is a deficient number, since it is larger than the sum of its proper divisors (70821901606).

85804019690 is a wasteful number, since it uses less digits than its factorization.

85804019690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47354.

The product of its (nonzero) digits is 622080, while the sum is 50.

The spelling of 85804019690 in words is "eighty-five billion, eight hundred four million, nineteen thousand, six hundred ninety".