1268191264 has 24 divisors (see below), whose sum is σ = 2497582080. Its totient is φ = 633884736.

The previous prime is 1268191231. The next prime is 1268191277. The reversal of 1268191264 is 4621918621.

It is an unprimeable number.

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, 144177 + ... + 152719.

It is an arithmetic number, because the mean of its divisors is an integer number (104065920).

Almost surely, 2^1268191264 is an apocalyptic number.

It is an amenable number.

1268191264 is a deficient number, since it is larger than the sum of its proper divisors (1229390816).

1268191264 is an equidigital number, since it uses as much as digits as its factorization.

1268191264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13192 (or 13184 counting only the distinct ones).

The product of its digits is 41472, while the sum is 40.

The square root of 1268191264 is about 35611.6731423841. The cubic root of 1268191264 is about 1082.4177840262.

The spelling of 1268191264 in words is "one billion, two hundred sixty-eight million, one hundred ninety-one thousand, two hundred sixty-four".