63315720 has 192 divisors, whose sum is σ = 225650880. Its totient is φ = 15303168.

The previous prime is 63315719. The next prime is 63315731. The reversal of 63315720 is 2751336.

It is a happy number.

63315720 is a `hidden beast` number, since 63 + 31 + 572 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 388359 + ... + 388521.

It is an arithmetic number, because the mean of its divisors is an integer number (1175265).

Almost surely, 2^63315720 is an apocalyptic number.

63315720 is a gapful number since it is divisible by the number (60) 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 63315720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112825440).

63315720 is an abundant number, since it is smaller than the sum of its proper divisors (162335160).

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

63315720 is a wasteful number, since it uses less digits than its factorization.

63315720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276 (or 269 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 27.

The square root of 63315720 is about 7957.1175685672. The cubic root of 63315720 is about 398.5693055511.

The spelling of 63315720 in words is "sixty-three million, three hundred fifteen thousand, seven hundred twenty".