1141638866 has 4 divisors (see below), whose sum is σ = 1712458302. Its totient is φ = 570819432.

The previous prime is 1141638821. The next prime is 1141638907. The reversal of 1141638866 is 6688361411.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 802305625 + 339333241 = 28325^2 + 18421^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 285409715 + ... + 285409718.

Almost surely, 2^1141638866 is an apocalyptic number.

1141638866 is a deficient number, since it is larger than the sum of its proper divisors (570819436).

1141638866 is an equidigital number, since it uses as much as digits as its factorization.

1141638866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 570819435.

The product of its digits is 165888, while the sum is 44.

The square root of 1141638866 is about 33788.1468269569. The cubic root of 1141638866 is about 1045.1442811094.

The spelling of 1141638866 in words is "one billion, one hundred forty-one million, six hundred thirty-eight thousand, eight hundred sixty-six".