1268251646 has 32 divisors (see below), whose sum is σ = 2032542720. Its totient is φ = 593499648.

The previous prime is 1268251613. The next prime is 1268251657. The reversal of 1268251646 is 6461528621.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3311171 + ... + 3311553.

It is an arithmetic number, because the mean of its divisors is an integer number (63516960).

Almost surely, 2^1268251646 is an apocalyptic number.

1268251646 is a deficient number, since it is larger than the sum of its proper divisors (764291074).

1268251646 is an equidigital number, since it uses as much as digits as its factorization.

1268251646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 773 (or 739 counting only the distinct ones).

The product of its digits is 138240, while the sum is 41.

The square root of 1268251646 is about 35612.5209161048. The cubic root of 1268251646 is about 1082.4349626951.

The spelling of 1268251646 in words is "one billion, two hundred sixty-eight million, two hundred fifty-one thousand, six hundred forty-six".