63678911 has 8 divisors (see below), whose sum is σ = 64169040. Its totient is φ = 63191232.

The previous prime is 63678907. The next prime is 63678919. The reversal of 63678911 is 11987636.

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 63678911 - 2² = 63678907 is a prime.

It is a super-2 number, since 2×63678911² = 8110007412291842, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63678919) 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, 121496 + ... + 122018.

It is an arithmetic number, because the mean of its divisors is an integer number (8021130).

Almost surely, 2^63678911 is an apocalyptic number.

63678911 is a deficient number, since it is larger than the sum of its proper divisors (490129).

63678911 is a wasteful number, since it uses less digits than its factorization.

63678911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1225.

The product of its digits is 54432, while the sum is 41.

The square root of 63678911 is about 7979.9067037153. The cubic root of 63678911 is about 399.3299427683.

The spelling of 63678911 in words is "sixty-three million, six hundred seventy-eight thousand, nine hundred eleven".