7986427597591 has 2 divisors, whose sum is σ = 7986427597592. Its totient is φ = 7986427597590.

The previous prime is 7986427597579. The next prime is 7986427597597. The reversal of 7986427597591 is 1957957246897.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7986427597591 is a prime.

It is a super-3 number, since 3×7986427597591³ (a number of 40 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7986427597597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3993213798795 + 3993213798796.

It is an arithmetic number, because the mean of its divisors is an integer number (3993213798796).

Almost surely, 2^{7986427597591} is an apocalyptic number.

7986427597591 is a deficient number, since it is larger than the sum of its proper divisors (1).

7986427597591 is an equidigital number, since it uses as much as digits as its factorization.

7986427597591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2400451200, while the sum is 79.

The spelling of 7986427597591 in words is "seven trillion, nine hundred eighty-six billion, four hundred twenty-seven million, five hundred ninety-seven thousand, five hundred ninety-one".