5636394720 has 672 divisors, whose sum is σ = 22845763584. Its totient is φ = 1300147200.

The previous prime is 5636394713. The next prime is 5636394749. The reversal of 5636394720 is 274936365.

5636394720 is a `hidden beast` number, since 5 + 6 + 3 + 639 + 4 + 7 + 2 + 0 = 666.

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 111 ways as a sum of consecutive naturals, for example, 29509825 + ... + 29510015.

It is an arithmetic number, because the mean of its divisors is an integer number (33996672).

Almost surely, 2^5636394720 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 5636394720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11422881792).

5636394720 is an abundant number, since it is smaller than the sum of its proper divisors (17209368864).

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

5636394720 is a wasteful number, since it uses less digits than its factorization.

5636394720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258 (or 235 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 45.

The square root of 5636394720 is about 75075.9263679110. The cubic root of 5636394720 is about 1779.6467253289.

The spelling of 5636394720 in words is "five billion, six hundred thirty-six million, three hundred ninety-four thousand, seven hundred twenty".