51261075629 has 2 divisors, whose sum is σ = 51261075630. Its totient is φ = 51261075628.

The previous prime is 51261075599. The next prime is 51261075641. The reversal of 51261075629 is 92657016215.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27133666729 + 24127408900 = 164723^2 + 155330^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51261075629 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51261075629.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51261075689) 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 as a sum of consecutive naturals, namely, 25630537814 + 25630537815.

It is an arithmetic number, because the mean of its divisors is an integer number (25630537815).

Almost surely, 2^51261075629 is an apocalyptic number.

It is an amenable number.

51261075629 is a deficient number, since it is larger than the sum of its proper divisors (1).

51261075629 is an equidigital number, since it uses as much as digits as its factorization.

51261075629 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 226800, while the sum is 44.

The spelling of 51261075629 in words is "fifty-one billion, two hundred sixty-one million, seventy-five thousand, six hundred twenty-nine".