1136868644 has 6 divisors (see below), whose sum is σ = 1989520134. Its totient is φ = 568434320.

The previous prime is 1136868641. The next prime is 1136868647. The reversal of 1136868644 is 4468686311.

It is an interprime number because it is at equal distance from previous prime (1136868641) and next prime (1136868647).

It can be written as a sum of positive squares in only one way, i.e., 1110222400 + 26646244 = 33320^2 + 5162^2 .

It is not an unprimeable number, because it can be changed into a prime (1136868641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142108577 + ... + 142108584.

It is an arithmetic number, because the mean of its divisors is an integer number (331586689).

Almost surely, 2^1136868644 is an apocalyptic number.

It is an amenable number.

1136868644 is a deficient number, since it is larger than the sum of its proper divisors (852651490).

1136868644 is a wasteful number, since it uses less digits than its factorization.

1136868644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284217165 (or 284217163 counting only the distinct ones).

The product of its digits is 663552, while the sum is 47.

The square root of 1136868644 is about 33717.4827648803. The cubic root of 1136868644 is about 1043.6865725306.

The spelling of 1136868644 in words is "one billion, one hundred thirty-six million, eight hundred sixty-eight thousand, six hundred forty-four".