51361871320650 has 48 divisors (see below), whose sum is σ = 138957208231968. Its totient is φ = 12451362744000.

The previous prime is 51361871320603. The next prime is 51361871320679. The reversal of 51361871320650 is 5602317816315.

51361871320650 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 51361871320650.

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 23 ways as a sum of consecutive naturals, for example, 15564201781 + ... + 15564205080.

It is an arithmetic number, because the mean of its divisors is an integer number (2894941838166).

Almost surely, 2^{51361871320650} is an apocalyptic number.

51361871320650 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51361871320650 is an abundant number, since it is smaller than the sum of its proper divisors (87595336911318).

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

51361871320650 is a wasteful number, since it uses less digits than its factorization.

51361871320650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31128406887 (or 31128406882 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 48.

The spelling of 51361871320650 in words is "fifty-one trillion, three hundred sixty-one billion, eight hundred seventy-one million, three hundred twenty thousand, six hundred fifty".