51901644845643 has 16 divisors (see below), whose sum is σ = 71888502938112. Its totient is φ = 33281714312000.

The previous prime is 51901644845623. The next prime is 51901644845681. The reversal of 51901644845643 is 34654844610915.

51901644845643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 51901644845643 - 2¹⁴ = 51901644829259 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51901644845623) 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 in 15 ways as a sum of consecutive naturals, for example, 2971572903 + ... + 2971590368.

It is an arithmetic number, because the mean of its divisors is an integer number (4493031433632).

Almost surely, 2^{51901644845643} is an apocalyptic number.

51901644845643 is a deficient number, since it is larger than the sum of its proper divisors (19986858092469).

51901644845643 is a wasteful number, since it uses less digits than its factorization.

51901644845643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5943163386.

The product of its (nonzero) digits is 49766400, while the sum is 60.

The spelling of 51901644845643 in words is "fifty-one trillion, nine hundred one billion, six hundred forty-four million, eight hundred forty-five thousand, six hundred forty-three".