51960818989 has 8 divisors (see below), whose sum is σ = 54646917120. Its totient is φ = 49310298576.

The previous prime is 51960818941. The next prime is 51960818999. The reversal of 51960818989 is 98981806915.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51960818989 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51960818989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51960818999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8891434 + ... + 8897275.

It is an arithmetic number, because the mean of its divisors is an integer number (6830864640).

Almost surely, 2^51960818989 is an apocalyptic number.

It is an amenable number.

51960818989 is a deficient number, since it is larger than the sum of its proper divisors (2686098131).

51960818989 is a wasteful number, since it uses less digits than its factorization.

51960818989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17788859.

The product of its (nonzero) digits is 11197440, while the sum is 64.

The spelling of 51960818989 in words is "fifty-one billion, nine hundred sixty million, eight hundred eighteen thousand, nine hundred eighty-nine".