53409505018 has 4 divisors (see below), whose sum is σ = 80114257530. Its totient is φ = 26704752508.

The previous prime is 53409505007. The next prime is 53409505063. The reversal of 53409505018 is 81050590435.

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., 53179588449 + 229916569 = 230607^2 + 15163^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13352376253 + ... + 13352376256.

Almost surely, 2^53409505018 is an apocalyptic number.

53409505018 is a deficient number, since it is larger than the sum of its proper divisors (26704752512).

53409505018 is a wasteful number, since it uses less digits than its factorization.

53409505018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26704752511.

The product of its (nonzero) digits is 108000, while the sum is 40.

The spelling of 53409505018 in words is "fifty-three billion, four hundred nine million, five hundred five thousand, eighteen".