85619971360 has 768 divisors, whose sum is σ = 274288508928. Its totient is φ = 24485068800.

The previous prime is 85619971343. The next prime is 85619971361. The reversal of 85619971360 is 6317991658.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is not an unprimeable number, because it can be changed into a prime (85619971361) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1031565879 + ... + 1031565961.

It is an arithmetic number, because the mean of its divisors is an integer number (357146496).

Almost surely, 2^85619971360 is an apocalyptic number.

85619971360 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 85619971360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137144254464).

85619971360 is an abundant number, since it is smaller than the sum of its proper divisors (188668537568).

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

85619971360 is a wasteful number, since it uses less digits than its factorization.

85619971360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257 (or 249 counting only the distinct ones).

The product of its (nonzero) digits is 2449440, while the sum is 55.

The spelling of 85619971360 in words is "eighty-five billion, six hundred nineteen million, nine hundred seventy-one thousand, three hundred sixty".