1131778567 has 8 divisors (see below), whose sum is σ = 1210877360. Its totient is φ = 1054632960.

The previous prime is 1131778537. The next prime is 1131778579. The reversal of 1131778567 is 7658771311.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1131778567 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131778537) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 487098 + ... + 489415.

It is an arithmetic number, because the mean of its divisors is an integer number (151359670).

Almost surely, 2^1131778567 is an apocalyptic number.

1131778567 is a deficient number, since it is larger than the sum of its proper divisors (79098793).

1131778567 is an equidigital number, since it uses as much as digits as its factorization.

1131778567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 976593.

The product of its digits is 246960, while the sum is 46.

The square root of 1131778567 is about 33641.9168151876. The cubic root of 1131778567 is about 1042.1266171047.

The spelling of 1131778567 in words is "one billion, one hundred thirty-one million, seven hundred seventy-eight thousand, five hundred sixty-seven".