85319438400 has 2016 divisors, whose sum is σ = 396214640640. Its totient is φ = 17627258880.

The previous prime is 85319438333. The next prime is 85319438431. The reversal of 85319438400 is 483491358.

85319438400 is a `hidden beast` number, since 8 + 53 + 194 + 3 + 8 + 400 = 666.

It is a tau number, because it is divible by the number of its divisors (2016).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 1815307177 + ... + 1815307223.

It is an arithmetic number, because the mean of its divisors is an integer number (196535040).

Almost surely, 2^85319438400 is an apocalyptic number.

85319438400 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 85319438400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (198107320320).

85319438400 is an abundant number, since it is smaller than the sum of its proper divisors (310895202240).

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

85319438400 is a wasteful number, since it uses less digits than its factorization.

85319438400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143 (or 116 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The spelling of 85319438400 in words is "eighty-five billion, three hundred nineteen million, four hundred thirty-eight thousand, four hundred".