85442797636 has 27 divisors (see below), whose sum is σ = 173945454879. Its totient is φ = 36616588008.

The previous prime is 85442797619. The next prime is 85442797639. The reversal of 85442797636 is 63679724458.

The square root of 85442797636 is 292306.

It is a perfect power (a square), and thus also a powerful number.

It is not an unprimeable number, because it can be changed into a prime (85442797639) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 4081845 + ... + 4102723.

Almost surely, 2^85442797636 is an apocalyptic number.

85442797636 is the 292306-th square number.

It is an amenable number.

85442797636 is an abundant number, since it is smaller than the sum of its proper divisors (88502657243).

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

85442797636 is an frugal number, since it uses more digits than its factorization.

85442797636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41776 (or 20888 counting only the distinct ones).

The product of its digits is 60963840, while the sum is 61.

The spelling of 85442797636 in words is "eighty-five billion, four hundred forty-two million, seven hundred ninety-seven thousand, six hundred thirty-six".