115646530221 has 24 divisors (see below), whose sum is σ = 173247756864. Its totient is φ = 77090603040.

The previous prime is 115646530201. The next prime is 115646530273. The reversal of 115646530221 is 122035646511.

115646530221 is a `hidden beast` number, since 1 + 1 + 5 + 646 + 5 + 3 + 0 + 2 + 2 + 1 = 666.

It is not a de Polignac number, because 115646530221 - 2²² = 115642335917 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115646530201) 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 23 ways as a sum of consecutive naturals, for example, 4947241 + ... + 4970561.

It is an arithmetic number, because the mean of its divisors is an integer number (7218656536).

Almost surely, 2^115646530221 is an apocalyptic number.

It is an amenable number.

115646530221 is a deficient number, since it is larger than the sum of its proper divisors (57601226643).

115646530221 is an equidigital number, since it uses as much as digits as its factorization.

115646530221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43743 (or 43731 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The spelling of 115646530221 in words is "one hundred fifteen billion, six hundred forty-six million, five hundred thirty thousand, two hundred twenty-one".