1265305868463 has 64 divisors (see below), whose sum is σ = 2142348364800. Its totient is φ = 646450467840.

The previous prime is 1265305868423. The next prime is 1265305868543. The reversal of 1265305868463 is 3648685035621.

It is not a de Polignac number, because 1265305868463 - 2¹⁰ = 1265305867439 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1265305868423) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1149193 + ... + 1962461.

It is an arithmetic number, because the mean of its divisors is an integer number (33474193200).

Almost surely, 2^{1265305868463} is an apocalyptic number.

1265305868463 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1265305868463 is a deficient number, since it is larger than the sum of its proper divisors (877042496337).

1265305868463 is a wasteful number, since it uses less digits than its factorization.

1265305868463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 813472.

The product of its (nonzero) digits is 24883200, while the sum is 57.

The spelling of 1265305868463 in words is "one trillion, two hundred sixty-five billion, three hundred five million, eight hundred sixty-eight thousand, four hundred sixty-three".