63405645 has 8 divisors (see below), whose sum is σ = 101449056. Its totient is φ = 33816336.

The previous prime is 63405619. The next prime is 63405653. The reversal of 63405645 is 54650436.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 63405645 - 2⁵ = 63405613 is a prime.

It is a super-3 number, since 3×63405645³ (a number of 24 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2113507 + ... + 2113536.

It is an arithmetic number, because the mean of its divisors is an integer number (12681132).

Almost surely, 2^63405645 is an apocalyptic number.

It is an amenable number.

63405645 is a deficient number, since it is larger than the sum of its proper divisors (38043411).

63405645 is a wasteful number, since it uses less digits than its factorization.

63405645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4227051.

The product of its (nonzero) digits is 43200, while the sum is 33.

The square root of 63405645 is about 7962.7661650961. The cubic root of 63405645 is about 398.7579074240.

The spelling of 63405645 in words is "sixty-three million, four hundred five thousand, six hundred forty-five".