63961656 has 32 divisors (see below), whose sum is σ = 174441600. Its totient is φ = 19382240.

The previous prime is 63961631. The next prime is 63961663. The reversal of 63961656 is 65616936.

It is a super-3 number, since 3×63961656³ (a number of 24 digits) contains 333 as substring.

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 7 ways as a sum of consecutive naturals, for example, 120876 + ... + 121403.

It is an arithmetic number, because the mean of its divisors is an integer number (5451300).

Almost surely, 2^63961656 is an apocalyptic number.

63961656 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

63961656 is an abundant number, since it is smaller than the sum of its proper divisors (110479944).

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

63961656 is a wasteful number, since it uses less digits than its factorization.

63961656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242299 (or 242295 counting only the distinct ones).

The product of its digits is 174960, while the sum is 42.

The square root of 63961656 is about 7997.6031409417. The cubic root of 63961656 is about 399.9201007080.

The spelling of 63961656 in words is "sixty-three million, nine hundred sixty-one thousand, six hundred fifty-six".