63540636 has 24 divisors (see below), whose sum is σ = 156065280. Its totient is φ = 20065392.

The previous prime is 63540629. The next prime is 63540637. The reversal of 63540636 is 63604536.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 63540597 and 63540606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63540637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139116 + ... + 139571.

It is an arithmetic number, because the mean of its divisors is an integer number (6502720).

Almost surely, 2^63540636 is an apocalyptic number.

It is an amenable number.

63540636 is an abundant number, since it is smaller than the sum of its proper divisors (92524644).

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

63540636 is a wasteful number, since it uses less digits than its factorization.

63540636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278713 (or 278711 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 33.

The square root of 63540636 is about 7971.2380468783. The cubic root of 63540636 is about 399.0406928303.

The spelling of 63540636 in words is "sixty-three million, five hundred forty thousand, six hundred thirty-six".