51661650149988 has 96 divisors (see below), whose sum is σ = 124924705920000. Its totient is φ = 16599139069440.

The previous prime is 51661650149959. The next prime is 51661650150073. The reversal of 51661650149988 is 88994105616615.

51661650149988 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 435136378 + ... + 435255086.

It is an arithmetic number, because the mean of its divisors is an integer number (1301299020000).

Almost surely, 2^{51661650149988} is an apocalyptic number.

It is an amenable number.

51661650149988 is an abundant number, since it is smaller than the sum of its proper divisors (73263055770012).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51661650149988 is a wasteful number, since it uses less digits than its factorization.

51661650149988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123365 (or 123363 counting only the distinct ones).

The product of its (nonzero) digits is 111974400, while the sum is 69.

The spelling of 51661650149988 in words is "fifty-one trillion, six hundred sixty-one billion, six hundred fifty million, one hundred forty-nine thousand, nine hundred eighty-eight".