1251268905463 has 2 divisors, whose sum is σ = 1251268905464. Its totient is φ = 1251268905462.

The previous prime is 1251268905457. The next prime is 1251268905517. The reversal of 1251268905463 is 3645098621521.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1251268905463 - 2¹³ = 1251268897271 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1251268905463.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1251268905413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 625634452731 + 625634452732.

It is an arithmetic number, because the mean of its divisors is an integer number (625634452732).

Almost surely, 2^{1251268905463} is an apocalyptic number.

1251268905463 is a deficient number, since it is larger than the sum of its proper divisors (1).

1251268905463 is an equidigital number, since it uses as much as digits as its factorization.

1251268905463 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3110400, while the sum is 52.

The spelling of 1251268905463 in words is "one trillion, two hundred fifty-one billion, two hundred sixty-eight million, nine hundred five thousand, four hundred sixty-three".