63775645 has 8 divisors (see below), whose sum is σ = 76774104. Its totient is φ = 50858304.

The previous prime is 63775639. The next prime is 63775651. The reversal of 63775645 is 54657736.

It is an interprime number because it is at equal distance from previous prime (63775639) and next prime (63775651).

It can be written as a sum of positive squares in 4 ways, for example, as 2137444 + 61638201 = 1462^2 + 7851^2 .

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 63775645 - 2¹¹ = 63773597 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, 18534 + ... + 21703.

It is an arithmetic number, because the mean of its divisors is an integer number (9596763).

Almost surely, 2^63775645 is an apocalyptic number.

It is an amenable number.

63775645 is a deficient number, since it is larger than the sum of its proper divisors (12998459).

63775645 is a wasteful number, since it uses less digits than its factorization.

63775645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40559.

The product of its digits is 529200, while the sum is 43.

The square root of 63775645 is about 7985.9655020542. The cubic root of 63775645 is about 399.5320465123.

The spelling of 63775645 in words is "sixty-three million, seven hundred seventy-five thousand, six hundred forty-five".