51555099608 has 8 divisors (see below), whose sum is σ = 96665811780. Its totient is φ = 25777549800.

The previous prime is 51555099601. The next prime is 51555099647. The reversal of 51555099608 is 80699055515.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 51555099608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51555099601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3222193718 + ... + 3222193733.

Almost surely, 2^51555099608 is an apocalyptic number.

It is an amenable number.

51555099608 is a deficient number, since it is larger than the sum of its proper divisors (45110712172).

51555099608 is a wasteful number, since it uses less digits than its factorization.

51555099608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6444387457 (or 6444387453 counting only the distinct ones).

The product of its (nonzero) digits is 2430000, while the sum is 53.

The spelling of 51555099608 in words is "fifty-one billion, five hundred fifty-five million, ninety-nine thousand, six hundred eight".