2551366789 has 2 divisors, whose sum is σ = 2551366790. Its totient is φ = 2551366788.

The previous prime is 2551366777. The next prime is 2551366801. The reversal of 2551366789 is 9876631552.

It is a balanced prime because it is at equal distance from previous prime (2551366777) and next prime (2551366801).

It can be written as a sum of positive squares in only one way, i.e., 2080910689 + 470456100 = 45617^2 + 21690^2 .

It is a cyclic number.

It is not a de Polignac number, because 2551366789 - 2¹³ = 2551358597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2551366739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1275683394 + 1275683395.

It is an arithmetic number, because the mean of its divisors is an integer number (1275683395).

Almost surely, 2^2551366789 is an apocalyptic number.

It is an amenable number.

2551366789 is a deficient number, since it is larger than the sum of its proper divisors (1).

2551366789 is an equidigital number, since it uses as much as digits as its factorization.

2551366789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2721600, while the sum is 52.

The square root of 2551366789 is about 50511.0561065595. The cubic root of 2551366789 is about 1366.4412563862.

The spelling of 2551366789 in words is "two billion, five hundred fifty-one million, three hundred sixty-six thousand, seven hundred eighty-nine".