51515066668 has 48 divisors (see below), whose sum is σ = 98035217280. Its totient is φ = 23544864000.

The previous prime is 51515066641. The next prime is 51515066683. The reversal of 51515066668 is 86666051515.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2238018 + ... + 2260918.

It is an arithmetic number, because the mean of its divisors is an integer number (2042400360).

Almost surely, 2^51515066668 is an apocalyptic number.

It is an amenable number.

51515066668 is a deficient number, since it is larger than the sum of its proper divisors (46520150612).

51515066668 is a wasteful number, since it uses less digits than its factorization.

51515066668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23338 (or 23336 counting only the distinct ones).

The product of its (nonzero) digits is 1296000, while the sum is 49.

The spelling of 51515066668 in words is "fifty-one billion, five hundred fifteen million, sixty-six thousand, six hundred sixty-eight".