1263648802 has 8 divisors (see below), whose sum is σ = 2041278876. Its totient is φ = 583222512.

The previous prime is 1263648797. The next prime is 1263648809. The reversal of 1263648802 is 2088463621.

It can be written as a sum of positive squares in 2 ways, for example, as 1256631601 + 7017201 = 35449^2 + 2649^2 .

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

It is not an unprimeable number, because it can be changed into a prime (1263648809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24300913 + ... + 24300964.

Almost surely, 2^1263648802 is an apocalyptic number.

1263648802 is a deficient number, since it is larger than the sum of its proper divisors (777630074).

1263648802 is a wasteful number, since it uses less digits than its factorization.

1263648802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48601892.

The product of its (nonzero) digits is 110592, while the sum is 40.

The square root of 1263648802 is about 35547.8382183783. The cubic root of 1263648802 is about 1081.1238877628.

The spelling of 1263648802 in words is "one billion, two hundred sixty-three million, six hundred forty-eight thousand, eight hundred two".