88197726597991 has 2 divisors, whose sum is σ = 88197726597992. Its totient is φ = 88197726597990.

The previous prime is 88197726597949. The next prime is 88197726598109. The reversal of 88197726597991 is 19979562779188.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 88197726597991 - 2⁹ = 88197726597479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (88197726597091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44098863298995 + 44098863298996.

It is an arithmetic number, because the mean of its divisors is an integer number (44098863298996).

Almost surely, 2^{88197726597991} is an apocalyptic number.

88197726597991 is a deficient number, since it is larger than the sum of its proper divisors (1).

88197726597991 is an equidigital number, since it uses as much as digits as its factorization.

88197726597991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8641624320, while the sum is 88.

The spelling of 88197726597991 in words is "eighty-eight trillion, one hundred ninety-seven billion, seven hundred twenty-six million, five hundred ninety-seven thousand, nine hundred ninety-one".