63561115 has 4 divisors (see below), whose sum is σ = 76273344. Its totient is φ = 50848888.

The previous prime is 63561107. The next prime is 63561131. The reversal of 63561115 is 51116536.

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

It is a cyclic number.

It is not a de Polignac number, because 63561115 - 2³ = 63561107 is a prime.

It is a Duffinian 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 3 ways as a sum of consecutive naturals, for example, 6356107 + ... + 6356116.

It is an arithmetic number, because the mean of its divisors is an integer number (19068336).

Almost surely, 2^63561115 is an apocalyptic number.

63561115 is a deficient number, since it is larger than the sum of its proper divisors (12712229).

63561115 is a wasteful number, since it uses less digits than its factorization.

63561115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12712228.

The product of its digits is 2700, while the sum is 28.

The square root of 63561115 is about 7972.5224991843. The cubic root of 63561115 is about 399.0835581895.

The spelling of 63561115 in words is "sixty-three million, five hundred sixty-one thousand, one hundred fifteen".