1263655632523 has 4 divisors (see below), whose sum is σ = 1263662019280. Its totient is φ = 1263649245768.

The previous prime is 1263655632493. The next prime is 1263655632559. The reversal of 1263655632523 is 3252365563621.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1263655632523 - 2²⁵ = 1263622078091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1263655632583) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2886783 + ... + 3295576.

It is an arithmetic number, because the mean of its divisors is an integer number (315915504820).

Almost surely, 2^{1263655632523} is an apocalyptic number.

1263655632523 is a deficient number, since it is larger than the sum of its proper divisors (6386757).

1263655632523 is an equidigital number, since it uses as much as digits as its factorization.

1263655632523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6386756.

The product of its digits is 5832000, while the sum is 49.

The spelling of 1263655632523 in words is "one trillion, two hundred sixty-three billion, six hundred fifty-five million, six hundred thirty-two thousand, five hundred twenty-three".