91382438507 has 6 divisors (see below), whose sum is σ = 94425351084. Its totient is φ = 88434616980.

The previous prime is 91382438489. The next prime is 91382438573. The reversal of 91382438507 is 70583428319.

It is not a de Polignac number, because 91382438507 - 2³⁰ = 90308696683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91382438107) 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 in 5 ways as a sum of consecutive naturals, for example, 47544533 + ... + 47546454.

It is an arithmetic number, because the mean of its divisors is an integer number (15737558514).

Almost surely, 2^91382438507 is an apocalyptic number.

91382438507 is a deficient number, since it is larger than the sum of its proper divisors (3042912577).

91382438507 is an equidigital number, since it uses as much as digits as its factorization.

91382438507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95091049 (or 95091018 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 50.

The spelling of 91382438507 in words is "ninety-one billion, three hundred eighty-two million, four hundred thirty-eight thousand, five hundred seven".