63159640 has 32 divisors (see below), whose sum is σ = 143239680. Its totient is φ = 25062912.

The previous prime is 63159637. The next prime is 63159661. The reversal of 63159640 is 4695136.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 63159596 and 63159605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1137 + ... + 11296.

It is an arithmetic number, because the mean of its divisors is an integer number (4476240).

Almost surely, 2^63159640 is an apocalyptic number.

It is an amenable number.

63159640 is an abundant number, since it is smaller than the sum of its proper divisors (80080040).

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

63159640 is a wasteful number, since it uses less digits than its factorization.

63159640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12571 (or 12567 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 63159640 is about 7947.3039453641. The cubic root of 63159640 is about 398.2415307934.

The spelling of 63159640 in words is "sixty-three million, one hundred fifty-nine thousand, six hundred forty".