64878542 has 8 divisors (see below), whose sum is σ = 98028576. Its totient is φ = 32202352.

The previous prime is 64878503. The next prime is 64878553. The reversal of 64878542 is 24587846.

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

It is a junction number, because it is equal to n+sod(n) for n = 64878493 and 64878502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118118 + ... + 118665.

It is an arithmetic number, because the mean of its divisors is an integer number (12253572).

Almost surely, 2^64878542 is an apocalyptic number.

64878542 is a deficient number, since it is larger than the sum of its proper divisors (33150034).

64878542 is a wasteful number, since it uses less digits than its factorization.

64878542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236922.

The product of its digits is 430080, while the sum is 44.

The square root of 64878542 is about 8054.7217208293. The cubic root of 64878542 is about 401.8219841669.

The spelling of 64878542 in words is "sixty-four million, eight hundred seventy-eight thousand, five hundred forty-two".