63678516 has 24 divisors (see below), whose sum is σ = 162091104. Its totient is φ = 19296480.

The previous prime is 63678499. The next prime is 63678533. The reversal of 63678516 is 61587636.

63678516 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (63678499) and next prime (63678533).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 241075 + ... + 241338.

It is an arithmetic number, because the mean of its divisors is an integer number (6753796).

Almost surely, 2^63678516 is an apocalyptic number.

63678516 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

63678516 is an abundant number, since it is smaller than the sum of its proper divisors (98412588).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

63678516 is a wasteful number, since it uses less digits than its factorization.

63678516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 482431 (or 482429 counting only the distinct ones).

The product of its digits is 181440, while the sum is 42.

The square root of 63678516 is about 7979.8819540141. The cubic root of 63678516 is about 399.3291170860.

The spelling of 63678516 in words is "sixty-three million, six hundred seventy-eight thousand, five hundred sixteen".