1263168513 has 20 divisors (see below), whose sum is σ = 1895295600. Its totient is φ = 838390392.

The previous prime is 1263168481. The next prime is 1263168521. The reversal of 1263168513 is 3158613621.

1263168513 is a `hidden beast` number, since 1 + 2 + 631 + 6 + 8 + 5 + 13 = 666.

It is not a de Polignac number, because 1263168513 - 2⁵ = 1263168481 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1263168553) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 15963 + ... + 52736.

It is an arithmetic number, because the mean of its divisors is an integer number (94764780).

Almost surely, 2^1263168513 is an apocalyptic number.

It is an amenable number.

1263168513 is a deficient number, since it is larger than the sum of its proper divisors (632127087).

1263168513 is an equidigital number, since it uses as much as digits as its factorization.

1263168513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68938 (or 68929 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 1263168513 is about 35541.0820459929. The cubic root of 1263168513 is about 1080.9868988278.

The spelling of 1263168513 in words is "one billion, two hundred sixty-three million, one hundred sixty-eight thousand, five hundred thirteen".