63878611 has 4 divisors (see below), whose sum is σ = 63954352. Its totient is φ = 63802872.

The previous prime is 63878599. The next prime is 63878641. The reversal of 63878611 is 11687836.

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 63878611 - 2⁹ = 63878099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63878641) by changing a digit.

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, 36591 + ... + 38296.

It is an arithmetic number, because the mean of its divisors is an integer number (15988588).

Almost surely, 2^63878611 is an apocalyptic number.

63878611 is a deficient number, since it is larger than the sum of its proper divisors (75741).

63878611 is an equidigital number, since it uses as much as digits as its factorization.

63878611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75740.

The product of its digits is 48384, while the sum is 40.

The square root of 63878611 is about 7992.4095866015. The cubic root of 63878611 is about 399.7469461932.

The spelling of 63878611 in words is "sixty-three million, eight hundred seventy-eight thousand, six hundred eleven".