85447798080 has 224 divisors, whose sum is σ = 273722592000. Its totient is φ = 22583328768.

The previous prime is 85447798061. The next prime is 85447798081. The reversal of 85447798080 is 8089774458.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85447798081) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 59794806 + ... + 59796234.

Almost surely, 2^85447798080 is an apocalyptic number.

85447798080 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 85447798080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (136861296000).

85447798080 is an abundant number, since it is smaller than the sum of its proper divisors (188274793920).

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

85447798080 is a wasteful number, since it uses less digits than its factorization.

85447798080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1961 (or 1951 counting only the distinct ones).

The product of its (nonzero) digits is 18063360, while the sum is 60.

The spelling of 85447798080 in words is "eighty-five billion, four hundred forty-seven million, seven hundred ninety-eight thousand, eighty".