85139020800 has 396 divisors, whose sum is σ = 305888122800. Its totient is φ = 22625648640.

The previous prime is 85139020753. The next prime is 85139020817. The reversal of 85139020800 is 802093158.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 103449189 + ... + 103450011.

Almost surely, 2^85139020800 is an apocalyptic number.

85139020800 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 85139020800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (152944061400).

85139020800 is an abundant number, since it is smaller than the sum of its proper divisors (220749102000).

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

85139020800 is a wasteful number, since it uses less digits than its factorization.

85139020800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1308 (or 1282 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The spelling of 85139020800 in words is "eighty-five billion, one hundred thirty-nine million, twenty thousand, eight hundred".