1263116805 has 8 divisors (see below), whose sum is σ = 2020986912. Its totient is φ = 673662288.

The previous prime is 1263116801. The next prime is 1263116839. The reversal of 1263116805 is 5086113621.

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

It is not a de Polignac number, because 1263116805 - 2² = 1263116801 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1263116801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42103879 + ... + 42103908.

It is an arithmetic number, because the mean of its divisors is an integer number (252623364).

Almost surely, 2^1263116805 is an apocalyptic number.

1263116805 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1263116805 is a deficient number, since it is larger than the sum of its proper divisors (757870107).

1263116805 is an equidigital number, since it uses as much as digits as its factorization.

1263116805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84207795.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 1263116805 is about 35540.3545986812. The cubic root of 1263116805 is about 1080.9721485041.

The spelling of 1263116805 in words is "one billion, two hundred sixty-three million, one hundred sixteen thousand, eight hundred five".