1263025503689 has 2 divisors, whose sum is σ = 1263025503690. Its totient is φ = 1263025503688.

The previous prime is 1263025503653. The next prime is 1263025503697. The reversal of 1263025503689 is 9863055203621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 891309704464 + 371715799225 = 944092^2 + 609685^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1263025503689 is a prime.

It is not a weakly prime, because it can be changed into another prime (1263025503629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 631512751844 + 631512751845.

It is an arithmetic number, because the mean of its divisors is an integer number (631512751845).

Almost surely, 2^{1263025503689} is an apocalyptic number.

It is an amenable number.

1263025503689 is a deficient number, since it is larger than the sum of its proper divisors (1).

1263025503689 is an equidigital number, since it uses as much as digits as its factorization.

1263025503689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2332800, while the sum is 50.

The spelling of 1263025503689 in words is "one trillion, two hundred sixty-three billion, twenty-five million, five hundred three thousand, six hundred eighty-nine".