115646551 has 4 divisors (see below), whose sum is σ = 115689600. Its totient is φ = 115603504.

The previous prime is 115646543. The next prime is 115646561. The reversal of 115646551 is 155646511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 155646511 = 79 ⋅1970209.

It is a cyclic number.

It is not a de Polignac number, because 115646551 - 2³ = 115646543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115646561) 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 3 ways as a sum of consecutive naturals, for example, 17206 + ... + 22963.

It is an arithmetic number, because the mean of its divisors is an integer number (28922400).

Almost surely, 2^115646551 is an apocalyptic number.

115646551 is a deficient number, since it is larger than the sum of its proper divisors (43049).

115646551 is an equidigital number, since it uses as much as digits as its factorization.

115646551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43048.

The product of its digits is 18000, while the sum is 34.

The square root of 115646551 is about 10753.9086382580. The cubic root of 115646551 is about 487.2040558382.

The spelling of 115646551 in words is "one hundred fifteen million, six hundred forty-six thousand, five hundred fifty-one".