53505778 has 8 divisors (see below), whose sum is σ = 81009072. Its totient is φ = 26502756.

The previous prime is 53505733. The next prime is 53505799. The reversal of 53505778 is 87750535.

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

It is a self number, because there is not a number n which added to its sum of digits gives 53505778.

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, 124800 + ... + 125227.

It is an arithmetic number, because the mean of its divisors is an integer number (10126134).

Almost surely, 2^53505778 is an apocalyptic number.

53505778 is a deficient number, since it is larger than the sum of its proper divisors (27503294).

53505778 is a wasteful number, since it uses less digits than its factorization.

53505778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250136.

The product of its (nonzero) digits is 147000, while the sum is 40.

The square root of 53505778 is about 7314.7643844488. The cubic root of 53505778 is about 376.8196667010.

The spelling of 53505778 in words is "fifty-three million, five hundred five thousand, seven hundred seventy-eight".