63878505 has 8 divisors (see below), whose sum is σ = 102205632. Its totient is φ = 34068528.

The previous prime is 63878501. The next prime is 63878509. The reversal of 63878505 is 50587836.

It is an interprime number because it is at equal distance from previous prime (63878501) and next prime (63878509).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 63878505 - 2² = 63878501 is a prime.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (63878501) 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, 2129269 + ... + 2129298.

It is an arithmetic number, because the mean of its divisors is an integer number (12775704).

Almost surely, 2^63878505 is an apocalyptic number.

It is an amenable number.

63878505 is a deficient number, since it is larger than the sum of its proper divisors (38327127).

63878505 is a wasteful number, since it uses less digits than its factorization.

63878505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4258575.

The product of its (nonzero) digits is 201600, while the sum is 42.

The square root of 63878505 is about 7992.4029553070. The cubic root of 63878505 is about 399.7467250801.

The spelling of 63878505 in words is "sixty-three million, eight hundred seventy-eight thousand, five hundred five".