2585066400 has 720 divisors, whose sum is σ = 11116163520. Its totient is φ = 572313600.

The previous prime is 2585066399. The next prime is 2585066447. The reversal of 2585066400 is 46605852.

2585066400 is a `hidden beast` number, since 2 + 5 + 8 + 5 + 0 + 6 + 640 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (720).

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

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 18597531 + ... + 18597669.

It is an arithmetic number, because the mean of its divisors is an integer number (15439116).

Almost surely, 2^2585066400 is an apocalyptic number.

2585066400 is a gapful number since it is divisible by the number (20) 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 2585066400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5558081760).

2585066400 is an abundant number, since it is smaller than the sum of its proper divisors (8531097120).

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

2585066400 is a wasteful number, since it uses less digits than its factorization.

2585066400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219 (or 197 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The square root of 2585066400 is about 50843.5482632753. The cubic root of 2585066400 is about 1372.4311530457.

The spelling of 2585066400 in words is "two billion, five hundred eighty-five million, sixty-six thousand, four hundred".