51550555610566 has 4 divisors (see below), whose sum is σ = 77325833415852. Its totient is φ = 25775277805282.

The previous prime is 51550555610557. The next prime is 51550555610569. The reversal of 51550555610566 is 66501655505515.

51550555610566 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51550555610569) by changing a digit.

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 as a sum of consecutive naturals, namely, 12887638902640 + ... + 12887638902643.

It is an arithmetic number, because the mean of its divisors is an integer number (19331458353963).

Almost surely, 2^{51550555610566} is an apocalyptic number.

51550555610566 is a deficient number, since it is larger than the sum of its proper divisors (25775277805286).

51550555610566 is a wasteful number, since it uses less digits than its factorization.

51550555610566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25775277805285.

The product of its (nonzero) digits is 16875000, while the sum is 55.

The spelling of 51550555610566 in words is "fifty-one trillion, five hundred fifty billion, five hundred fifty-five million, six hundred ten thousand, five hundred sixty-six".