63878507 has 24 divisors (see below), whose sum is σ = 83699712. Its totient is φ = 48157200.

The previous prime is 63878501. The next prime is 63878509. The reversal of 63878507 is 70587836.

It is not a de Polignac number, because 63878507 - 2⁶ = 63878443 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63878501) 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 23 ways as a sum of consecutive naturals, for example, 14798 + ... + 18620.

It is an arithmetic number, because the mean of its divisors is an integer number (3487488).

Almost surely, 2^63878507 is an apocalyptic number.

63878507 is a deficient number, since it is larger than the sum of its proper divisors (19821205).

63878507 is a wasteful number, since it uses less digits than its factorization.

63878507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3879 (or 3872 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 44.

The square root of 63878507 is about 7992.4030804258. The cubic root of 63878507 is about 399.7467292520.

The spelling of 63878507 in words is "sixty-three million, eight hundred seventy-eight thousand, five hundred seven".