51508199608 has 8 divisors (see below), whose sum is σ = 96577874280. Its totient is φ = 25754099800.

The previous prime is 51508199563. The next prime is 51508199621. The reversal of 51508199608 is 80699180515.

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

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 3219262468 + ... + 3219262483.

It is an arithmetic number, because the mean of its divisors is an integer number (12072234285).

Almost surely, 2^51508199608 is an apocalyptic number.

It is an amenable number.

51508199608 is a deficient number, since it is larger than the sum of its proper divisors (45069674672).

51508199608 is a wasteful number, since it uses less digits than its factorization.

51508199608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6438524957 (or 6438524953 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 52.

The spelling of 51508199608 in words is "fifty-one billion, five hundred eight million, one hundred ninety-nine thousand, six hundred eight".