8521745400 has 384 divisors, whose sum is σ = 33790694400. Its totient is φ = 1933632000.

The previous prime is 8521745399. The next prime is 8521745411. The reversal of 8521745400 is 45471258.

8521745400 is a `hidden beast` number, since 85 + 2 + 174 + 5 + 400 = 666.

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

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 95 ways as a sum of consecutive naturals, for example, 5707054 + ... + 5708546.

It is an arithmetic number, because the mean of its divisors is an integer number (87996600).

Almost surely, 2^8521745400 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8521745400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16895347200).

8521745400 is an abundant number, since it is smaller than the sum of its proper divisors (25268949000).

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

8521745400 is a wasteful number, since it uses less digits than its factorization.

8521745400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1676 (or 1661 counting only the distinct ones).

The product of its (nonzero) digits is 44800, while the sum is 36.

The square root of 8521745400 is about 92313.3002334983. The cubic root of 8521745400 is about 2042.5664066756.

The spelling of 8521745400 in words is "eight billion, five hundred twenty-one million, seven hundred forty-five thousand, four hundred".