51029818189 has 6 divisors (see below), whose sum is σ = 59361217134. Its totient is φ = 43739844120.

The previous prime is 51029818183. The next prime is 51029818199. The reversal of 51029818189 is 98181892015.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 50745221289 + 284596900 = 225267^2 + 16870^2 .

It is a de Polignac number, because none of the positive numbers 2^k-51029818189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51029818183) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 520712382 + ... + 520712479.

It is an arithmetic number, because the mean of its divisors is an integer number (9893536189).

Almost surely, 2^51029818189 is an apocalyptic number.

It is an amenable number.

51029818189 is a deficient number, since it is larger than the sum of its proper divisors (8331398945).

51029818189 is a wasteful number, since it uses less digits than its factorization.

51029818189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1041424875 (or 1041424868 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 52.

The spelling of 51029818189 in words is "fifty-one billion, twenty-nine million, eight hundred eighteen thousand, one hundred eighty-nine".