116015561 has 2 divisors, whose sum is σ = 116015562. Its totient is φ = 116015560.

The previous prime is 116015551. The next prime is 116015563. The reversal of 116015561 is 165510611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 111091600 + 4923961 = 10540^2 + 2219^2 .

It is a cyclic number.

It is not a de Polignac number, because 116015561 - 2¹⁰ = 116014537 is a prime.

It is a super-4 number, since 4×116015561⁴ (a number of 33 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

Together with 116015563, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 116015561.

It is not a weakly prime, because it can be changed into another prime (116015563) 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 as a sum of consecutive naturals, namely, 58007780 + 58007781.

It is an arithmetic number, because the mean of its divisors is an integer number (58007781).

Almost surely, 2^116015561 is an apocalyptic number.

It is an amenable number.

116015561 is a deficient number, since it is larger than the sum of its proper divisors (1).

116015561 is an equidigital number, since it uses as much as digits as its factorization.

116015561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 900, while the sum is 26.

The square root of 116015561 is about 10771.0519913331. The cubic root of 116015561 is about 487.7217028854.

The spelling of 116015561 in words is "one hundred sixteen million, fifteen thousand, five hundred sixty-one".