1268326656 has 54 divisors (see below), whose sum is σ = 3656905070. Its totient is φ = 422774784.

The previous prime is 1268326649. The next prime is 1268326693. The reversal of 1268326656 is 6566238621.

1268326656 is a `hidden beast` number, since 1 + 268 + 326 + 65 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1049760000 + 218566656 = 32400^2 + 14784^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 272941 + ... + 277548.

Almost surely, 2^1268326656 is an apocalyptic number.

1268326656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1268326656 is an abundant number, since it is smaller than the sum of its proper divisors (2388578414).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1268326656 is an equidigital number, since it uses as much as digits as its factorization.

1268326656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550511 (or 550494 counting only the distinct ones).

The product of its digits is 622080, while the sum is 45.

The square root of 1268326656 is about 35613.5740413680. The cubic root of 1268326656 is about 1082.4563022681.

The spelling of 1268326656 in words is "one billion, two hundred sixty-eight million, three hundred twenty-six thousand, six hundred fifty-six".