51903344641 has 4 divisors (see below), whose sum is σ = 51932954692. Its totient is φ = 51873734592.

The previous prime is 51903344627. The next prime is 51903344707. The reversal of 51903344641 is 14644330915.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14644330915 = 5 ⋅2928866183.

It can be written as a sum of positive squares in 2 ways, for example, as 8649744016 + 43253600625 = 93004^2 + 207975^2 .

It is a cyclic number.

It is not a de Polignac number, because 51903344641 - 2¹¹ = 51903342593 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51903344594 and 51903344603.

It is not an unprimeable number, because it can be changed into a prime (51903344621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14802396 + ... + 14805901.

It is an arithmetic number, because the mean of its divisors is an integer number (12983238673).

Almost surely, 2^51903344641 is an apocalyptic number.

It is an amenable number.

51903344641 is a deficient number, since it is larger than the sum of its proper divisors (29610051).

51903344641 is a wasteful number, since it uses less digits than its factorization.

51903344641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29610050.

The product of its (nonzero) digits is 155520, while the sum is 40.

The spelling of 51903344641 in words is "fifty-one billion, nine hundred three million, three hundred forty-four thousand, six hundred forty-one".