63956646 has 96 divisors (see below), whose sum is σ = 156854880. Its totient is φ = 18703872.

The previous prime is 63956591. The next prime is 63956663. The reversal of 63956646 is 64665936.

63956646 is a `hidden beast` number, since 639 + 5 + 6 + 6 + 4 + 6 = 666.

It is a Curzon number.

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 47 ways as a sum of consecutive naturals, for example, 718570 + ... + 718658.

It is an arithmetic number, because the mean of its divisors is an integer number (1633905).

Almost surely, 2^63956646 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63956646, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78427440).

63956646 is an abundant number, since it is smaller than the sum of its proper divisors (92898234).

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

63956646 is a wasteful number, since it uses less digits than its factorization.

63956646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230 (or 227 counting only the distinct ones).

The product of its digits is 699840, while the sum is 45.

The square root of 63956646 is about 7997.2899159653. The cubic root of 63956646 is about 399.9096587644.

It can be divided in two parts, 6395 and 6646, that added together give a triangular number (13041 = T₁₆₁).

The spelling of 63956646 in words is "sixty-three million, nine hundred fifty-six thousand, six hundred forty-six".