1263025503653 has 2 divisors, whose sum is σ = 1263025503654. Its totient is φ = 1263025503652.

The previous prime is 1263025503647. The next prime is 1263025503689. The reversal of 1263025503653 is 3563055203621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1261528819684 + 1496683969 = 1123178^2 + 38687^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1263025503653 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1263025503653.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1263025502653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 631512751826 + 631512751827.

It is an arithmetic number, because the mean of its divisors is an integer number (631512751827).

Almost surely, 2^{1263025503653} is an apocalyptic number.

It is an amenable number.

1263025503653 is a deficient number, since it is larger than the sum of its proper divisors (1).

1263025503653 is an equidigital number, since it uses as much as digits as its factorization.

1263025503653 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 486000, while the sum is 41.

The spelling of 1263025503653 in words is "one trillion, two hundred sixty-three billion, twenty-five million, five hundred three thousand, six hundred fifty-three".