115999504569 has 135 divisors (see below), whose sum is σ = 195073164957. Its totient is φ = 68662339200.

The previous prime is 115999504547. The next prime is 115999504591. The reversal of 115999504569 is 965405999511.

The square root of 115999504569 is 340587.

It is a perfect power (a square), and thus also a powerful number.

115999504569 is a `hidden beast` number, since 1 + 1 + 5 + 99 + 95 + 0 + 456 + 9 = 666.

It is an interprime number because it is at equal distance from previous prime (115999504547) and next prime (115999504591).

It can be written as a sum of positive squares in 4 ways, for example, as 77264541225 + 38734963344 = 277965^2 + 196812^2 .

It is not a de Polignac number, because 115999504569 - 2⁷ = 115999504441 is a prime.

It is a super-2 number, since 2×115999504569² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (115999504519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 134 ways as a sum of consecutive naturals, for example, 1633795804 + ... + 1633795874.

Almost surely, 2^115999504569 is an apocalyptic number.

115999504569 is the 340587-th square number.

115999504569 is the 170294-th centered octagonal number.

It is an amenable number.

115999504569 is a deficient number, since it is larger than the sum of its proper divisors (79073660388).

115999504569 is an frugal number, since it uses more digits than its factorization.

115999504569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262 (or 128 counting only the distinct ones).

The product of its (nonzero) digits is 19683000, while the sum is 63.

The spelling of 115999504569 in words is "one hundred fifteen billion, nine hundred ninety-nine million, five hundred four thousand, five hundred sixty-nine".