63645413 has 8 divisors (see below), whose sum is σ = 69312600. Its totient is φ = 58088448.

The previous prime is 63645409. The next prime is 63645437. The reversal of 63645413 is 31454636.

It can be written as a sum of positive squares in 4 ways, for example, as 2211169 + 61434244 = 1487^2 + 7838^2 .

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 63645413 - 2² = 63645409 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 63645413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63645493) 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, 26348 + ... + 28661.

It is an arithmetic number, because the mean of its divisors is an integer number (8664075).

Almost surely, 2^63645413 is an apocalyptic number.

It is an amenable number.

63645413 is a deficient number, since it is larger than the sum of its proper divisors (5667187).

63645413 is a wasteful number, since it uses less digits than its factorization.

63645413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55111.

The product of its digits is 25920, while the sum is 32.

The square root of 63645413 is about 7977.8075308947. The cubic root of 63645413 is about 399.2599085896.

The spelling of 63645413 in words is "sixty-three million, six hundred forty-five thousand, four hundred thirteen".