1263360255605 has 16 divisors (see below), whose sum is σ = 1792353467520. Its totient is φ = 836431616832.

The previous prime is 1263360255473. The next prime is 1263360255799. The reversal of 1263360255605 is 5065520633621.

It is not a de Polignac number, because 1263360255605 - 2⁸ = 1263360255349 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 622343939 + ... + 622345968.

It is an arithmetic number, because the mean of its divisors is an integer number (112022091720).

Almost surely, 2^{1263360255605} is an apocalyptic number.

It is an amenable number.

1263360255605 is a deficient number, since it is larger than the sum of its proper divisors (528993211915).

1263360255605 is a wasteful number, since it uses less digits than its factorization.

1263360255605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1244689948.

The product of its (nonzero) digits is 972000, while the sum is 44.

The spelling of 1263360255605 in words is "one trillion, two hundred sixty-three billion, three hundred sixty million, two hundred fifty-five thousand, six hundred five".