1268576161 has 2 divisors, whose sum is σ = 1268576162. Its totient is φ = 1268576160.

The previous prime is 1268576143. The next prime is 1268576207. The reversal of 1268576161 is 1616758621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1241857600 + 26718561 = 35240^2 + 5169^2 .

It is a cyclic number.

It is not a de Polignac number, because 1268576161 - 2²¹ = 1266479009 is a prime.

It is not a weakly prime, because it can be changed into another prime (1268576461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 634288080 + 634288081.

It is an arithmetic number, because the mean of its divisors is an integer number (634288081).

Almost surely, 2^1268576161 is an apocalyptic number.

It is an amenable number.

1268576161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1268576161 is an equidigital number, since it uses as much as digits as its factorization.

1268576161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 43.

The square root of 1268576161 is about 35617.0768171674. The cubic root of 1268576161 is about 1082.5272778196.

The spelling of 1268576161 in words is "one billion, two hundred sixty-eight million, five hundred seventy-six thousand, one hundred sixty-one".