91532745587 has 2 divisors, whose sum is σ = 91532745588. Its totient is φ = 91532745586.

The previous prime is 91532745517. The next prime is 91532745607. The reversal of 91532745587 is 78554723519.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91532745587 - 2¹² = 91532741491 is a prime.

It is not a weakly prime, because it can be changed into another prime (91532745517) 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, 45766372793 + 45766372794.

It is an arithmetic number, because the mean of its divisors is an integer number (45766372794).

Almost surely, 2^91532745587 is an apocalyptic number.

91532745587 is a deficient number, since it is larger than the sum of its proper divisors (1).

91532745587 is an equidigital number, since it uses as much as digits as its factorization.

91532745587 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10584000, while the sum is 56.

The spelling of 91532745587 in words is "ninety-one billion, five hundred thirty-two million, seven hundred forty-five thousand, five hundred eighty-seven".