51646873289 has 8 divisors (see below), whose sum is σ = 56354110560. Its totient is φ = 46941647200.

The previous prime is 51646873277. The next prime is 51646873331. The reversal of 51646873289 is 98237864615.

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 51646873289 - 2²⁴ = 51630096073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51646873219) 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, 448844 + ... + 552045.

It is an arithmetic number, because the mean of its divisors is an integer number (7044263820).

Almost surely, 2^51646873289 is an apocalyptic number.

It is an amenable number.

51646873289 is a deficient number, since it is larger than the sum of its proper divisors (4707237271).

51646873289 is a wasteful number, since it uses less digits than its factorization.

51646873289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1005591.

The product of its digits is 17418240, while the sum is 59.

The spelling of 51646873289 in words is "fifty-one billion, six hundred forty-six million, eight hundred seventy-three thousand, two hundred eighty-nine".