51651110389 has 2 divisors, whose sum is σ = 51651110390. Its totient is φ = 51651110388.

The previous prime is 51651110377. The next prime is 51651110429. The reversal of 51651110389 is 98301115615.

51651110389 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (51651110429) can be obtained adding 51651110389 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50561120164 + 1089990225 = 224858^2 + 33015^2 .

It is a cyclic number.

It is not a de Polignac number, because 51651110389 - 2²¹ = 51649013237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51651110089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25825555194 + 25825555195.

It is an arithmetic number, because the mean of its divisors is an integer number (25825555195).

Almost surely, 2^51651110389 is an apocalyptic number.

It is an amenable number.

51651110389 is a deficient number, since it is larger than the sum of its proper divisors (1).

51651110389 is an equidigital number, since it uses as much as digits as its factorization.

51651110389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32400, while the sum is 40.

The spelling of 51651110389 in words is "fifty-one billion, six hundred fifty-one million, one hundred ten thousand, three hundred eighty-nine".