53778878 has 4 divisors (see below), whose sum is σ = 80668320. Its totient is φ = 26889438.

The previous prime is 53778869. The next prime is 53778889. The reversal of 53778878 is 87887735.

It is a semiprime because it is the product of two primes.

It is a plaindrome in base 16.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13444718 + ... + 13444721.

It is an arithmetic number, because the mean of its divisors is an integer number (20167080).

Almost surely, 2^53778878 is an apocalyptic number.

53778878 is a deficient number, since it is larger than the sum of its proper divisors (26889442).

53778878 is a wasteful number, since it uses less digits than its factorization.

53778878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26889441.

The product of its digits is 2634240, while the sum is 53.

The square root of 53778878 is about 7333.4083481012. The cubic root of 53778878 is about 377.4596901537.

The spelling of 53778878 in words is "fifty-three million, seven hundred seventy-eight thousand, eight hundred seventy-eight".