51166131559 has 8 divisors (see below), whose sum is σ = 52734179520. Its totient is φ = 49618058976.

The previous prime is 51166131557. The next prime is 51166131613. The reversal of 51166131559 is 95513166115.

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 51166131559 - 2¹ = 51166131557 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 (51166131557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4988644 + ... + 4998889.

It is an arithmetic number, because the mean of its divisors is an integer number (6591772440).

Almost surely, 2^51166131559 is an apocalyptic number.

51166131559 is a deficient number, since it is larger than the sum of its proper divisors (1568047961).

51166131559 is a wasteful number, since it uses less digits than its factorization.

51166131559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9987689.

The product of its digits is 121500, while the sum is 43.

The spelling of 51166131559 in words is "fifty-one billion, one hundred sixty-six million, one hundred thirty-one thousand, five hundred fifty-nine".