85581294422400 has 2688 divisors, whose sum is σ = 369552437130240. Its totient is φ = 19171808870400.

The previous prime is 85581294422399. The next prime is 85581294422411. The reversal of 85581294422400 is 422449218558.

It is a happy number.

85581294422400 is a `hidden beast` number, since 8 + 5 + 58 + 129 + 4 + 422 + 40 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (2688).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 335 ways as a sum of consecutive naturals, for example, 315798134265 + ... + 315798134535.

It is an arithmetic number, because the mean of its divisors is an integer number (137482305480).

Almost surely, 2^{85581294422400} is an apocalyptic number.

85581294422400 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 85581294422400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (184776218565120).

85581294422400 is an abundant number, since it is smaller than the sum of its proper divisors (283971142707840).

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

85581294422400 is a wasteful number, since it uses less digits than its factorization.

85581294422400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 636 (or 604 counting only the distinct ones).

The product of its (nonzero) digits is 7372800, while the sum is 54.

The spelling of 85581294422400 in words is "eighty-five trillion, five hundred eighty-one billion, two hundred ninety-four million, four hundred twenty-two thousand, four hundred".