1263638796 has 24 divisors (see below), whose sum is σ = 3369703680. Its totient is φ = 361039632.

The previous prime is 1263638777. The next prime is 1263638801. The reversal of 1263638796 is 6978363621.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7521576 + ... + 7521743.

It is an arithmetic number, because the mean of its divisors is an integer number (140404320).

Almost surely, 2^1263638796 is an apocalyptic number.

It is an amenable number.

1263638796 is an abundant number, since it is smaller than the sum of its proper divisors (2106064884).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1263638796 is a wasteful number, since it uses less digits than its factorization.

1263638796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15043333 (or 15043331 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 51.

The square root of 1263638796 is about 35547.6974781771. The cubic root of 1263638796 is about 1081.1210341867.

The spelling of 1263638796 in words is "one billion, two hundred sixty-three million, six hundred thirty-eight thousand, seven hundred ninety-six".