1263777968 has 20 divisors (see below), whose sum is σ = 2458105320. Its totient is φ = 629428224.

The previous prime is 1263777859. The next prime is 1263777997. The reversal of 1263777968 is 8697773621.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 149558 + ... + 157781.

It is an arithmetic number, because the mean of its divisors is an integer number (122905266).

Almost surely, 2^1263777968 is an apocalyptic number.

It is an amenable number.

1263777968 is a deficient number, since it is larger than the sum of its proper divisors (1194327352).

1263777968 is a wasteful number, since it uses less digits than its factorization.

1263777968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307604 (or 307598 counting only the distinct ones).

The product of its digits is 5334336, while the sum is 56.

The square root of 1263777968 is about 35549.6549631638. The cubic root of 1263777968 is about 1081.1607228101.

The spelling of 1263777968 in words is "one billion, two hundred sixty-three million, seven hundred seventy-seven thousand, nine hundred sixty-eight".