1149661816 has 16 divisors (see below), whose sum is σ = 2185146000. Its totient is φ = 566956224.

The previous prime is 1149661813. The next prime is 1149661871. The reversal of 1149661816 is 6181669411.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1149661813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 983716 + ... + 984883.

It is an arithmetic number, because the mean of its divisors is an integer number (136571625).

Almost surely, 2^1149661816 is an apocalyptic number.

It is an amenable number.

1149661816 is a deficient number, since it is larger than the sum of its proper divisors (1035484184).

1149661816 is a wasteful number, since it uses less digits than its factorization.

1149661816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1968678 (or 1968674 counting only the distinct ones).

The product of its digits is 62208, while the sum is 43.

The square root of 1149661816 is about 33906.6632979419. The cubic root of 1149661816 is about 1047.5868440178.

The spelling of 1149661816 in words is "one billion, one hundred forty-nine million, six hundred sixty-one thousand, eight hundred sixteen".