85299081840 has 480 divisors, whose sum is σ = 346186414080. Its totient is φ = 18386694144.

The previous prime is 85299081839. The next prime is 85299081863. The reversal of 85299081840 is 4818099258.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 22310169 + ... + 22313991.

It is an arithmetic number, because the mean of its divisors is an integer number (721221696).

Almost surely, 2^85299081840 is an apocalyptic number.

85299081840 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 85299081840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (173093207040).

85299081840 is an abundant number, since it is smaller than the sum of its proper divisors (260887332240).

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

85299081840 is a wasteful number, since it uses less digits than its factorization.

85299081840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4101 (or 4092 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 54.

The spelling of 85299081840 in words is "eighty-five billion, two hundred ninety-nine million, eighty-one thousand, eight hundred forty".