51651066115009 has 2 divisors, whose sum is σ = 51651066115010. Its totient is φ = 51651066115008.

The previous prime is 51651066114983. The next prime is 51651066115013. The reversal of 51651066115009 is 90051166015615.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50699426844609 + 951639270400 = 7120353^2 + 975520^2 .

It is a cyclic number.

It is not a de Polignac number, because 51651066115009 - 2⁹ = 51651066114497 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51651066115009.

It is not a weakly prime, because it can be changed into another prime (51651066115409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25825533057504 + 25825533057505.

It is an arithmetic number, because the mean of its divisors is an integer number (25825533057505).

Almost surely, 2^{51651066115009} is an apocalyptic number.

It is an amenable number.

51651066115009 is a deficient number, since it is larger than the sum of its proper divisors (1).

51651066115009 is an equidigital number, since it uses as much as digits as its factorization.

51651066115009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 243000, while the sum is 46.

The spelling of 51651066115009 in words is "fifty-one trillion, six hundred fifty-one billion, sixty-six million, one hundred fifteen thousand, nine".