53656778 has 8 divisors (see below), whose sum is σ = 91983072. Its totient is φ = 22995756.

The previous prime is 53656763. The next prime is 53656781. The reversal of 53656778 is 87765635.

It is a happy number.

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

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, 1916300 + ... + 1916327.

It is an arithmetic number, because the mean of its divisors is an integer number (11497884).

Almost surely, 2^53656778 is an apocalyptic number.

53656778 is a deficient number, since it is larger than the sum of its proper divisors (38326294).

53656778 is a wasteful number, since it uses less digits than its factorization.

53656778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3832636.

The product of its digits is 1058400, while the sum is 47.

The square root of 53656778 is about 7325.0787026489. The cubic root of 53656778 is about 377.1738111783.

The spelling of 53656778 in words is "fifty-three million, six hundred fifty-six thousand, seven hundred seventy-eight".