115661441 has 4 divisors (see below), whose sum is σ = 132184512. Its totient is φ = 99138372.

The previous prime is 115661431. The next prime is 115661449. The reversal of 115661441 is 144166511.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-115661441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115661449) 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, 8261525 + ... + 8261538.

It is an arithmetic number, because the mean of its divisors is an integer number (33046128).

Almost surely, 2^115661441 is an apocalyptic number.

It is an amenable number.

115661441 is a deficient number, since it is larger than the sum of its proper divisors (16523071).

115661441 is an equidigital number, since it uses as much as digits as its factorization.

115661441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16523070.

The product of its digits is 2880, while the sum is 29.

The square root of 115661441 is about 10754.6009223960. The cubic root of 115661441 is about 487.2249648262.

The spelling of 115661441 in words is "one hundred fifteen million, six hundred sixty-one thousand, four hundred forty-one".