115511628081 has 16 divisors (see below), whose sum is σ = 164465948160. Its totient is φ = 71953848960.

The previous prime is 115511628079. The next prime is 115511628083. The reversal of 115511628081 is 180826115511.

It is an interprime number because it is at equal distance from previous prime (115511628079) and next prime (115511628083).

It is not a de Polignac number, because 115511628081 - 2¹ = 115511628079 is a prime.

It is a super-2 number, since 2×115511628081² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (115511628083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21412140 + ... + 21417533.

It is an arithmetic number, because the mean of its divisors is an integer number (10279121760).

Almost surely, 2^115511628081 is an apocalyptic number.

It is an amenable number.

115511628081 is a deficient number, since it is larger than the sum of its proper divisors (48954320079).

115511628081 is a wasteful number, since it uses less digits than its factorization.

115511628081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42829736.

The product of its (nonzero) digits is 19200, while the sum is 39.

The spelling of 115511628081 in words is "one hundred fifteen billion, five hundred eleven million, six hundred twenty-eight thousand, eighty-one".