63956720 has 160 divisors (see below), whose sum is σ = 170989056. Its totient is φ = 22118400.

The previous prime is 63956719. The next prime is 63956749. The reversal of 63956720 is 2765936.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1559900 + ... + 1559940.

Almost surely, 2^63956720 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 63956720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85494528).

63956720 is an abundant number, since it is smaller than the sum of its proper divisors (107032336).

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

63956720 is a wasteful number, since it uses less digits than its factorization.

63956720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139 (or 133 counting only the distinct ones).

The product of its (nonzero) digits is 68040, while the sum is 38.

The square root of 63956720 is about 7997.2945425312. The cubic root of 63956720 is about 399.9098130006.

The spelling of 63956720 in words is "sixty-three million, nine hundred fifty-six thousand, seven hundred twenty".