1263155203263 has 8 divisors (see below), whose sum is σ = 1688604346368. Its totient is φ = 839904764504.

The previous prime is 1263155203237. The next prime is 1263155203273. The reversal of 1263155203263 is 3623025513621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1263155203263 - 2¹⁷ = 1263155072191 is a prime.

It is a super-2 number, since 2×1263155203263² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1263155203223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 549674745 + ... + 549677042.

It is an arithmetic number, because the mean of its divisors is an integer number (211075543296).

Almost surely, 2^{1263155203263} is an apocalyptic number.

1263155203263 is a deficient number, since it is larger than the sum of its proper divisors (425449143105).

1263155203263 is a wasteful number, since it uses less digits than its factorization.

1263155203263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1099352173.

The product of its (nonzero) digits is 194400, while the sum is 39.

The spelling of 1263155203263 in words is "one trillion, two hundred sixty-three billion, one hundred fifty-five million, two hundred three thousand, two hundred sixty-three".