1131778568 has 32 divisors (see below), whose sum is σ = 2156081760. Its totient is φ = 556859520.

The previous prime is 1131778537. The next prime is 1131778579. The reversal of 1131778568 is 8658771311.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 284771 + ... + 288717.

It is an arithmetic number, because the mean of its divisors is an integer number (67377555).

Almost surely, 2^1131778568 is an apocalyptic number.

It is an amenable number.

1131778568 is a deficient number, since it is larger than the sum of its proper divisors (1024303192).

1131778568 is a wasteful number, since it uses less digits than its factorization.

1131778568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4517 (or 4513 counting only the distinct ones).

The product of its digits is 282240, while the sum is 47.

The square root of 1131778568 is about 33641.9168300500. The cubic root of 1131778568 is about 1042.1266174117.

The spelling of 1131778568 in words is "one billion, one hundred thirty-one million, seven hundred seventy-eight thousand, five hundred sixty-eight".