1268776361 has 32 divisors (see below), whose sum is σ = 1397658240. Its totient is φ = 1148829696.

The previous prime is 1268776337. The next prime is 1268776367. The reversal of 1268776361 is 1636778621.

It is a cyclic number.

It is not a de Polignac number, because 1268776361 - 2¹⁸ = 1268514217 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1268776367) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4936745 + ... + 4937001.

It is an arithmetic number, because the mean of its divisors is an integer number (43676820).

Almost surely, 2^1268776361 is an apocalyptic number.

It is an amenable number.

1268776361 is a deficient number, since it is larger than the sum of its proper divisors (128881879).

1268776361 is a wasteful number, since it uses less digits than its factorization.

1268776361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473.

The product of its digits is 508032, while the sum is 47.

The square root of 1268776361 is about 35619.8871559133. The cubic root of 1268776361 is about 1082.5842210730.

The spelling of 1268776361 in words is "one billion, two hundred sixty-eight million, seven hundred seventy-six thousand, three hundred sixty-one".