51000400155412 has 12 divisors (see below), whose sum is σ = 89798250581536. Its totient is φ = 25343757132120.

The previous prime is 51000400155379. The next prime is 51000400155421. The reversal of 51000400155412 is 21455100400015.

It is a congruent number.

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, 39110735664 + ... + 39110736967.

Almost surely, 2^{51000400155412} is an apocalyptic number.

It is an amenable number.

51000400155412 is a deficient number, since it is larger than the sum of its proper divisors (38797850426124).

51000400155412 is a wasteful number, since it uses less digits than its factorization.

51000400155412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78221472798 (or 78221472796 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 28.

Adding to 51000400155412 its reverse (21455100400015), we get a palindrome (72455500555427).

The spelling of 51000400155412 in words is "fifty-one trillion, four hundred million, one hundred fifty-five thousand, four hundred twelve".