115720166505 has 8 divisors (see below), whose sum is σ = 185152266432. Its totient is φ = 61717422128.

The previous prime is 115720166491. The next prime is 115720166531. The reversal of 115720166505 is 505661027511.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 115720166505 - 2¹⁰ = 115720165481 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3857338869 + ... + 3857338898.

It is an arithmetic number, because the mean of its divisors is an integer number (23144033304).

Almost surely, 2^115720166505 is an apocalyptic number.

115720166505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

115720166505 is a deficient number, since it is larger than the sum of its proper divisors (69432099927).

115720166505 is an equidigital number, since it uses as much as digits as its factorization.

115720166505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7714677775.

The product of its (nonzero) digits is 63000, while the sum is 39.

The spelling of 115720166505 in words is "one hundred fifteen billion, seven hundred twenty million, one hundred sixty-six thousand, five hundred five".