51331554332394 has 32 divisors (see below), whose sum is σ = 117332601657216. Its totient is φ = 14665741554240.

The previous prime is 51331554332381. The next prime is 51331554332411. The reversal of 51331554332394 is 49323345513315.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15870877 + ... + 18829440.

It is an arithmetic number, because the mean of its divisors is an integer number (3666643801788).

Almost surely, 2^{51331554332394} is an apocalyptic number.

51331554332394 is an abundant number, since it is smaller than the sum of its proper divisors (66001047324822).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51331554332394 is a wasteful number, since it uses less digits than its factorization.

51331554332394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34735550.

The product of its digits is 8748000, while the sum is 51.

The spelling of 51331554332394 in words is "fifty-one trillion, three hundred thirty-one billion, five hundred fifty-four million, three hundred thirty-two thousand, three hundred ninety-four".