63634144 has 36 divisors (see below), whose sum is σ = 145737144. Its totient is φ = 27271104.

The previous prime is 63634139. The next prime is 63634147. The reversal of 63634144 is 44143636.

It is a happy number.

It is a super-2 number, since 2×63634144² = 8098608565225472, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63634147) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18724 + ... + 21859.

It is an arithmetic number, because the mean of its divisors is an integer number (4048254).

Almost surely, 2^63634144 is an apocalyptic number.

It is an amenable number.

63634144 is an abundant number, since it is smaller than the sum of its proper divisors (82103000).

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

63634144 is a wasteful number, since it uses less digits than its factorization.

63634144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40607 (or 40592 counting only the distinct ones).

The product of its digits is 20736, while the sum is 31.

The square root of 63634144 is about 7977.1012278897. The cubic root of 63634144 is about 399.2363429978.

The spelling of 63634144 in words is "sixty-three million, six hundred thirty-four thousand, one hundred forty-four".