1261876568 has 16 divisors (see below), whose sum is σ = 2366432160. Its totient is φ = 630828000.

The previous prime is 1261876501. The next prime is 1261876597. The reversal of 1261876568 is 8656781621.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55073 + ... + 74543.

It is an arithmetic number, because the mean of its divisors is an integer number (147902010).

Almost surely, 2^1261876568 is an apocalyptic number.

It is an amenable number.

1261876568 is a deficient number, since it is larger than the sum of its proper divisors (1104555592).

1261876568 is a wasteful number, since it uses less digits than its factorization.

1261876568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27578 (or 27574 counting only the distinct ones).

The product of its digits is 967680, while the sum is 50.

The square root of 1261876568 is about 35522.9020210906. The cubic root of 1261876568 is about 1080.6182354215.

The spelling of 1261876568 in words is "one billion, two hundred sixty-one million, eight hundred seventy-six thousand, five hundred sixty-eight".