63645764 has 24 divisors (see below), whose sum is σ = 137083968. Its totient is φ = 25178400.

The previous prime is 63645731. The next prime is 63645767. The reversal of 63645764 is 46754636.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (63645767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87062 + ... + 87789.

It is an arithmetic number, because the mean of its divisors is an integer number (5711832).

Almost surely, 2^63645764 is an apocalyptic number.

It is an amenable number.

63645764 is an abundant number, since it is smaller than the sum of its proper divisors (73438204).

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

63645764 is a wasteful number, since it uses less digits than its factorization.

63645764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174875 (or 174873 counting only the distinct ones).

The product of its digits is 362880, while the sum is 41.

The square root of 63645764 is about 7977.8295293896. The cubic root of 63645764 is about 399.2606425518.

The spelling of 63645764 in words is "sixty-three million, six hundred forty-five thousand, seven hundred sixty-four".