53445578 has 4 divisors (see below), whose sum is σ = 80168370. Its totient is φ = 26722788.

The previous prime is 53445547. The next prime is 53445589. The reversal of 53445578 is 87554435.

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

It can be written as a sum of positive squares in only one way, i.e., 42601729 + 10843849 = 6527^2 + 3293^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13361393 + ... + 13361396.

Almost surely, 2^53445578 is an apocalyptic number.

53445578 is a deficient number, since it is larger than the sum of its proper divisors (26722792).

53445578 is a wasteful number, since it uses less digits than its factorization.

53445578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26722791.

The product of its digits is 336000, while the sum is 41.

The square root of 53445578 is about 7310.6482612693. The cubic root of 53445578 is about 376.6782922074.

The spelling of 53445578 in words is "fifty-three million, four hundred forty-five thousand, five hundred seventy-eight".