51318585989 has 16 divisors (see below), whose sum is σ = 57449056896. Its totient is φ = 45436262400.

The previous prime is 51318585959. The next prime is 51318586021. The reversal of 51318585989 is 98958581315.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 51318585989 - 2²⁰ = 51317537413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51318585949) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 161624 + ... + 358830.

It is an arithmetic number, because the mean of its divisors is an integer number (3590566056).

Almost surely, 2^51318585989 is an apocalyptic number.

It is an amenable number.

51318585989 is a deficient number, since it is larger than the sum of its proper divisors (6130470907).

51318585989 is a wasteful number, since it uses less digits than its factorization.

51318585989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197836.

The product of its digits is 15552000, while the sum is 62.

The spelling of 51318585989 in words is "fifty-one billion, three hundred eighteen million, five hundred eighty-five thousand, nine hundred eighty-nine".