51562244609 has 2 divisors, whose sum is σ = 51562244610. Its totient is φ = 51562244608.

The previous prime is 51562244599. The next prime is 51562244641. The reversal of 51562244609 is 90644226515.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48795484609 + 2766760000 = 220897^2 + 52600^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51562244609 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51562244609.

It is not a weakly prime, because it can be changed into another prime (51562244309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25781122304 + 25781122305.

It is an arithmetic number, because the mean of its divisors is an integer number (25781122305).

Almost surely, 2^51562244609 is an apocalyptic number.

It is an amenable number.

51562244609 is a deficient number, since it is larger than the sum of its proper divisors (1).

51562244609 is an equidigital number, since it uses as much as digits as its factorization.

51562244609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 518400, while the sum is 44.

The spelling of 51562244609 in words is "fifty-one billion, five hundred sixty-two million, two hundred forty-four thousand, six hundred nine".