1268566853 has 2 divisors, whose sum is σ = 1268566854. Its totient is φ = 1268566852.

The previous prime is 1268566813. The next prime is 1268566879. The reversal of 1268566853 is 3586658621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1249056964 + 19509889 = 35342^2 + 4417^2 .

It is a cyclic number.

It is not a de Polignac number, because 1268566853 - 2¹⁶ = 1268501317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1268566813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 634283426 + 634283427.

It is an arithmetic number, because the mean of its divisors is an integer number (634283427).

Almost surely, 2^1268566853 is an apocalyptic number.

It is an amenable number.

1268566853 is a deficient number, since it is larger than the sum of its proper divisors (1).

1268566853 is an equidigital number, since it uses as much as digits as its factorization.

1268566853 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2073600, while the sum is 50.

The square root of 1268566853 is about 35616.9461492700. The cubic root of 1268566853 is about 1082.5246301824.

The spelling of 1268566853 in words is "one billion, two hundred sixty-eight million, five hundred sixty-six thousand, eight hundred fifty-three".