105815087087 has 2 divisors, whose sum is σ = 105815087088. Its totient is φ = 105815087086.

The previous prime is 105815087083. The next prime is 105815087143. The reversal of 105815087087 is 780780518501.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 105815087087 - 2² = 105815087083 is a prime.

It is a super-2 number, since 2×105815087087² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (105815087083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52907543543 + 52907543544.

It is an arithmetic number, because the mean of its divisors is an integer number (52907543544).

Almost surely, 2^105815087087 is an apocalyptic number.

105815087087 is a deficient number, since it is larger than the sum of its proper divisors (1).

105815087087 is an equidigital number, since it uses as much as digits as its factorization.

105815087087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 627200, while the sum is 50.

The spelling of 105815087087 in words is "one hundred five billion, eight hundred fifteen million, eighty-seven thousand, eighty-seven".