51973899189 has 16 divisors (see below), whose sum is σ = 70026153600. Its totient is φ = 34285982976.

The previous prime is 51973899139. The next prime is 51973899203. The reversal of 51973899189 is 98199837915.

51973899189 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-51973899189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51973899139) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 333057 + ... + 463545.

It is an arithmetic number, because the mean of its divisors is an integer number (4376634600).

Almost surely, 2^51973899189 is an apocalyptic number.

It is an amenable number.

51973899189 is a deficient number, since it is larger than the sum of its proper divisors (18052254411).

51973899189 is a wasteful number, since it uses less digits than its factorization.

51973899189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131884.

The product of its digits is 44089920, while the sum is 69.

The spelling of 51973899189 in words is "fifty-one billion, nine hundred seventy-three million, eight hundred ninety-nine thousand, one hundred eighty-nine".