1115959681 has 16 divisors (see below), whose sum is σ = 1163496960. Its totient is φ = 1069577280.

The previous prime is 1115959673. The next prime is 1115959703. The reversal of 1115959681 is 1869595111.

It is a cyclic number.

It is not a de Polignac number, because 1115959681 - 2³ = 1115959673 is a prime.

It is a super-2 number, since 2×1115959681² = 2490732019235243522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1115959601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 770500 + ... + 771946.

It is an arithmetic number, because the mean of its divisors is an integer number (72718560).

Almost surely, 2^1115959681 is an apocalyptic number.

It is an amenable number.

1115959681 is a deficient number, since it is larger than the sum of its proper divisors (47537279).

1115959681 is a wasteful number, since it uses less digits than its factorization.

1115959681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1824.

The product of its digits is 97200, while the sum is 46.

The square root of 1115959681 is about 33405.9827126819. The cubic root of 1115959681 is about 1037.2485459417.

The spelling of 1115959681 in words is "one billion, one hundred fifteen million, nine hundred fifty-nine thousand, six hundred eighty-one".