116615561 has 2 divisors, whose sum is σ = 116615562. Its totient is φ = 116615560.

The previous prime is 116615519. The next prime is 116615617. The reversal of 116615561 is 165516611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 93238336 + 23377225 = 9656^2 + 4835^2 .

It is a cyclic number.

It is not a de Polignac number, because 116615561 - 2¹⁸ = 116353417 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (116615501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58307780 + 58307781.

It is an arithmetic number, because the mean of its divisors is an integer number (58307781).

Almost surely, 2^116615561 is an apocalyptic number.

It is an amenable number.

116615561 is a deficient number, since it is larger than the sum of its proper divisors (1).

116615561 is an equidigital number, since it uses as much as digits as its factorization.

116615561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5400, while the sum is 32.

The square root of 116615561 is about 10798.8685055426. The cubic root of 116615561 is about 488.5610442969.

The spelling of 116615561 in words is "one hundred sixteen million, six hundred fifteen thousand, five hundred sixty-one".