63506645 has 16 divisors (see below), whose sum is σ = 84939840. Its totient is φ = 45298944.

The previous prime is 63506629. The next prime is 63506647. The reversal of 63506645 is 54660536.

It is a cyclic number.

It is not a de Polignac number, because 63506645 - 2⁴ = 63506629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63506647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18047 + ... + 21276.

It is an arithmetic number, because the mean of its divisors is an integer number (5308740).

Almost surely, 2^63506645 is an apocalyptic number.

It is an amenable number.

63506645 is a deficient number, since it is larger than the sum of its proper divisors (21433195).

63506645 is a wasteful number, since it uses less digits than its factorization.

63506645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39364.

The product of its (nonzero) digits is 64800, while the sum is 35.

The square root of 63506645 is about 7969.1056587298. The cubic root of 63506645 is about 398.9695246645.

The spelling of 63506645 in words is "sixty-three million, five hundred six thousand, six hundred forty-five".