63636406 has 16 divisors (see below), whose sum is σ = 101218464. Its totient is φ = 29902464.

The previous prime is 63636403. The next prime is 63636407. The reversal of 63636406 is 60463636.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63636401) 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, 40471 + ... + 42013.

It is an arithmetic number, because the mean of its divisors is an integer number (6326154).

Almost surely, 2^63636406 is an apocalyptic number.

63636406 is a deficient number, since it is larger than the sum of its proper divisors (37582058).

63636406 is a wasteful number, since it uses less digits than its factorization.

63636406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2775.

The product of its (nonzero) digits is 46656, while the sum is 34.

The square root of 63636406 is about 7977.2430074556. The cubic root of 63636406 is about 399.2410734870.

It can be divided in two parts, 6363 and 6406, that added together give a square (12769 = 113²).

The spelling of 63636406 in words is "sixty-three million, six hundred thirty-six thousand, four hundred six".