51908696859 has 16 divisors (see below), whose sum is σ = 69354489600. Its totient is φ = 34534403616.

The previous prime is 51908696809. The next prime is 51908696881. The reversal of 51908696859 is 95869680915.

It is not a de Polignac number, because 51908696859 - 2⁷ = 51908696731 is a prime.

It is a super-3 number, since 3×51908696859³ (a number of 33 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51908696859.

It is not an unprimeable number, because it can be changed into a prime (51908696809) 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 15 ways as a sum of consecutive naturals, for example, 5386057 + ... + 5395685.

It is an arithmetic number, because the mean of its divisors is an integer number (4334655600).

Almost surely, 2^51908696859 is an apocalyptic number.

51908696859 is a deficient number, since it is larger than the sum of its proper divisors (17445792741).

51908696859 is a wasteful number, since it uses less digits than its factorization.

51908696859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13154.

The product of its (nonzero) digits is 41990400, while the sum is 66.

The spelling of 51908696859 in words is "fifty-one billion, nine hundred eight million, six hundred ninety-six thousand, eight hundred fifty-nine".