63645724 has 12 divisors (see below), whose sum is σ = 111439048. Its totient is φ = 31806000.

The previous prime is 63645713. The next prime is 63645727. The reversal of 63645724 is 42754636.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63645727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8614 + ... + 14194.

Almost surely, 2^63645724 is an apocalyptic number.

It is an amenable number.

63645724 is a deficient number, since it is larger than the sum of its proper divisors (47793324).

63645724 is a wasteful number, since it uses less digits than its factorization.

63645724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8436 (or 8434 counting only the distinct ones).

The product of its digits is 120960, while the sum is 37.

The square root of 63645724 is about 7977.8270224416. The cubic root of 63645724 is about 399.2605589095.

It can be divided in two parts, 636 and 45724, that added together give a triangular number (46360 = T₃₀₄).

The spelling of 63645724 in words is "sixty-three million, six hundred forty-five thousand, seven hundred twenty-four".