51651103613 has 2 divisors, whose sum is σ = 51651103614. Its totient is φ = 51651103612.

The previous prime is 51651103591. The next prime is 51651103633. The reversal of 51651103613 is 31630115615.

51651103613 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41376848569 + 10274255044 = 203413^2 + 101362^2 .

It is a cyclic number.

It is not a de Polignac number, because 51651103613 - 2⁶ = 51651103549 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51651103613.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51651103633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25825551806 + 25825551807.

It is an arithmetic number, because the mean of its divisors is an integer number (25825551807).

Almost surely, 2^51651103613 is an apocalyptic number.

It is an amenable number.

51651103613 is a deficient number, since it is larger than the sum of its proper divisors (1).

51651103613 is an equidigital number, since it uses as much as digits as its factorization.

51651103613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8100, while the sum is 32.

The spelling of 51651103613 in words is "fifty-one billion, six hundred fifty-one million, one hundred three thousand, six hundred thirteen".