1268944557 has 16 divisors (see below), whose sum is σ = 1719083520. Its totient is φ = 832412592.

The previous prime is 1268944543. The next prime is 1268944601. The reversal of 1268944557 is 7554498621.

It is not a de Polignac number, because 1268944557 - 2¹² = 1268940461 is a prime.

It is a super-2 number, since 2×1268944557² = 3220440577479852498, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1268946557) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 210694 + ... + 216632.

It is an arithmetic number, because the mean of its divisors is an integer number (107442720).

Almost surely, 2^1268944557 is an apocalyptic number.

It is an amenable number.

1268944557 is a deficient number, since it is larger than the sum of its proper divisors (450138963).

1268944557 is a wasteful number, since it uses less digits than its factorization.

1268944557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7072.

The product of its digits is 2419200, while the sum is 51.

The square root of 1268944557 is about 35622.2480621311. The cubic root of 1268944557 is about 1082.6320567399.

The spelling of 1268944557 in words is "one billion, two hundred sixty-eight million, nine hundred forty-four thousand, five hundred fifty-seven".