1149121568 has 48 divisors (see below), whose sum is σ = 2588350464. Its totient is φ = 491942400.

The previous prime is 1149121559. The next prime is 1149121573. The reversal of 1149121568 is 8651219411.

It is a happy number.

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, 255596 + ... + 260052.

It is an arithmetic number, because the mean of its divisors is an integer number (53923968).

Almost surely, 2^1149121568 is an apocalyptic number.

It is an amenable number.

1149121568 is an abundant number, since it is smaller than the sum of its proper divisors (1439228896).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1149121568 is a wasteful number, since it uses less digits than its factorization.

1149121568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5625 (or 5617 counting only the distinct ones).

The product of its digits is 17280, while the sum is 38.

The square root of 1149121568 is about 33898.6956681227. The cubic root of 1149121568 is about 1047.4227246325.

The spelling of 1149121568 in words is "one billion, one hundred forty-nine million, one hundred twenty-one thousand, five hundred sixty-eight".