51189829685 has 8 divisors (see below), whose sum is σ = 61991354040. Its totient is φ = 40576158144.

The previous prime is 51189829657. The next prime is 51189829693. The reversal of 51189829685 is 58692898115.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3795668881 + 47394160804 = 61609^2 + 217702^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 51189829685 - 2¹⁰ = 51189828661 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46962602 + ... + 46963691.

It is an arithmetic number, because the mean of its divisors is an integer number (7748919255).

Almost surely, 2^51189829685 is an apocalyptic number.

It is an amenable number.

51189829685 is a deficient number, since it is larger than the sum of its proper divisors (10801524355).

51189829685 is a wasteful number, since it uses less digits than its factorization.

51189829685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93926407.

The product of its digits is 12441600, while the sum is 62.

The spelling of 51189829685 in words is "fifty-one billion, one hundred eighty-nine million, eight hundred twenty-nine thousand, six hundred eighty-five".