51438363433318 has 4 divisors (see below), whose sum is σ = 77157545149980. Its totient is φ = 25719181716658.

The previous prime is 51438363433309. The next prime is 51438363433351. The reversal of 51438363433318 is 81333436383415.

51438363433318 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

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, 12859590858328 + ... + 12859590858331.

It is an arithmetic number, because the mean of its divisors is an integer number (19289386287495).

Almost surely, 2^{51438363433318} is an apocalyptic number.

51438363433318 is a deficient number, since it is larger than the sum of its proper divisors (25719181716662).

51438363433318 is a wasteful number, since it uses less digits than its factorization.

51438363433318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25719181716661.

The product of its digits is 22394880, while the sum is 55.

The spelling of 51438363433318 in words is "fifty-one trillion, four hundred thirty-eight billion, three hundred sixty-three million, four hundred thirty-three thousand, three hundred eighteen".