1153989681 has 16 divisors (see below), whose sum is σ = 1744223040. Its totient is φ = 672770880.

The previous prime is 1153989679. The next prime is 1153989689. The reversal of 1153989681 is 1869893511.

It is not a de Polignac number, because 1153989681 - 2¹ = 1153989679 is a prime.

It is a super-2 number, since 2×1153989681² = 2663384367708963522, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1153989689) 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 15 ways as a sum of consecutive naturals, for example, 777930 + ... + 779411.

It is an arithmetic number, because the mean of its divisors is an integer number (109013940).

Almost surely, 2^1153989681 is an apocalyptic number.

It is an amenable number.

1153989681 is a deficient number, since it is larger than the sum of its proper divisors (590233359).

1153989681 is a wasteful number, since it uses less digits than its factorization.

1153989681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1557376.

The product of its digits is 466560, while the sum is 51.

The square root of 1153989681 is about 33970.4236211443. The cubic root of 1153989681 is about 1048.8997336314.

The spelling of 1153989681 in words is "one billion, one hundred fifty-three million, nine hundred eighty-nine thousand, six hundred eighty-one".