8061505598891 has 2 divisors, whose sum is σ = 8061505598892. Its totient is φ = 8061505598890.

The previous prime is 8061505598837. The next prime is 8061505598893. The reversal of 8061505598891 is 1988955051608.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8061505598891 - 2¹⁸ = 8061505336747 is a prime.

Together with 8061505598893, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (8061505598893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4030752799445 + 4030752799446.

It is an arithmetic number, because the mean of its divisors is an integer number (4030752799446).

Almost surely, 2^{8061505598891} is an apocalyptic number.

8061505598891 is a deficient number, since it is larger than the sum of its proper divisors (1).

8061505598891 is an equidigital number, since it uses as much as digits as its factorization.

8061505598891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104000, while the sum is 65.

The spelling of 8061505598891 in words is "eight trillion, sixty-one billion, five hundred five million, five hundred ninety-eight thousand, eight hundred ninety-one".