1276668356 has 12 divisors (see below), whose sum is σ = 2249165100. Its totient is φ = 634049760.

The previous prime is 1276668331. The next prime is 1276668377. The reversal of 1276668356 is 6538666721.

It can be written as a sum of positive squares in 2 ways, for example, as 170041600 + 1106626756 = 13040^2 + 33266^2 .

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, 1070435 + ... + 1071626.

It is an arithmetic number, because the mean of its divisors is an integer number (187430425).

Almost surely, 2^1276668356 is an apocalyptic number.

It is an amenable number.

1276668356 is a deficient number, since it is larger than the sum of its proper divisors (972496744).

1276668356 is a wasteful number, since it uses less digits than its factorization.

1276668356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2142214 (or 2142212 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 50.

The square root of 1276668356 is about 35730.4961622421. The cubic root of 1276668356 is about 1084.8241996807.

The spelling of 1276668356 in words is "one billion, two hundred seventy-six million, six hundred sixty-eight thousand, three hundred fifty-six".