105615559081 has 2 divisors, whose sum is σ = 105615559082. Its totient is φ = 105615559080.

The previous prime is 105615559061. The next prime is 105615559097. The reversal of 105615559081 is 180955516501.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 98169422400 + 7446136681 = 313320^2 + 86291^2 .

It is an emirp because it is prime and its reverse (180955516501) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 105615559081 - 2⁹ = 105615558569 is a prime.

It is a super-2 number, since 2×105615559081² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (105615559061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52807779540 + 52807779541.

It is an arithmetic number, because the mean of its divisors is an integer number (52807779541).

Almost surely, 2^105615559081 is an apocalyptic number.

It is an amenable number.

105615559081 is a deficient number, since it is larger than the sum of its proper divisors (1).

105615559081 is an equidigital number, since it uses as much as digits as its factorization.

105615559081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 270000, while the sum is 46.

The spelling of 105615559081 in words is "one hundred five billion, six hundred fifteen million, five hundred fifty-nine thousand, eighty-one".