51206661505202 has 32 divisors (see below), whose sum is σ = 87857157233664. Its totient is φ = 21927142630800.

The previous prime is 51206661505187. The next prime is 51206661505297. The reversal of 51206661505202 is 20250516660215.

51206661505202 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 51206661505202.

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 15 ways as a sum of consecutive naturals, for example, 79125677 + ... + 79770207.

It is an arithmetic number, because the mean of its divisors is an integer number (2745536163552).

Almost surely, 2^{51206661505202} is an apocalyptic number.

51206661505202 is a deficient number, since it is larger than the sum of its proper divisors (36650495728462).

51206661505202 is a wasteful number, since it uses less digits than its factorization.

51206661505202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649334.

The product of its (nonzero) digits is 216000, while the sum is 41.

The spelling of 51206661505202 in words is "fifty-one trillion, two hundred six billion, six hundred sixty-one million, five hundred five thousand, two hundred two".