63544861 has 4 divisors (see below), whose sum is σ = 67282812. Its totient is φ = 59806912.

The previous prime is 63544853. The next prime is 63544867. The reversal of 63544861 is 16844536.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 59197636 + 4347225 = 7694^2 + 2085^2 .

It is a cyclic number.

It is not a de Polignac number, because 63544861 - 2³ = 63544853 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 63544861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63544867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1868950 + ... + 1868983.

It is an arithmetic number, because the mean of its divisors is an integer number (16820703).

Almost surely, 2^63544861 is an apocalyptic number.

It is an amenable number.

63544861 is a deficient number, since it is larger than the sum of its proper divisors (3737951).

63544861 is a wasteful number, since it uses less digits than its factorization.

63544861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3737950.

The product of its digits is 69120, while the sum is 37.

The square root of 63544861 is about 7971.5030577677. The cubic root of 63544861 is about 399.0495370894.

The spelling of 63544861 in words is "sixty-three million, five hundred forty-four thousand, eight hundred sixty-one".