51974343172 has 6 divisors (see below), whose sum is σ = 90955100558. Its totient is φ = 25987171584.

The previous prime is 51974343139. The next prime is 51974343217. The reversal of 51974343172 is 27134347915.

It can be written as a sum of positive squares in only one way, i.e., 30886656516 + 21087686656 = 175746^2 + 145216^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6496792893 + ... + 6496792900.

Almost surely, 2^51974343172 is an apocalyptic number.

It is an amenable number.

51974343172 is a deficient number, since it is larger than the sum of its proper divisors (38980757386).

51974343172 is a wasteful number, since it uses less digits than its factorization.

51974343172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12993585797 (or 12993585795 counting only the distinct ones).

The product of its digits is 635040, while the sum is 46.

The spelling of 51974343172 in words is "fifty-one billion, nine hundred seventy-four million, three hundred forty-three thousand, one hundred seventy-two".