63403645 has 8 divisors (see below), whose sum is σ = 76219704. Its totient is φ = 50632704.

The previous prime is 63403621. The next prime is 63403651. The reversal of 63403645 is 54630436.

It can be written as a sum of positive squares in 4 ways, for example, as 23600164 + 39803481 = 4858^2 + 6309^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 63403645 - 2²⁵ = 29849213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8104 + ... + 13873.

It is an arithmetic number, because the mean of its divisors is an integer number (9527463).

Almost surely, 2^63403645 is an apocalyptic number.

It is an amenable number.

63403645 is a deficient number, since it is larger than the sum of its proper divisors (12816059).

63403645 is a wasteful number, since it uses less digits than its factorization.

63403645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22559.

The product of its (nonzero) digits is 25920, while the sum is 31.

The square root of 63403645 is about 7962.6405796067. The cubic root of 63403645 is about 398.7537147153.

The spelling of 63403645 in words is "sixty-three million, four hundred three thousand, six hundred forty-five".