91755879481 has 24 divisors (see below), whose sum is σ = 107600988480. Its totient is φ = 78012396000.

The previous prime is 91755879461. The next prime is 91755879493. The reversal of 91755879481 is 18497855719.

It is not a de Polignac number, because 91755879481 - 2³³ = 83165944889 is a prime.

It is a super-2 number, since 2×91755879481² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91755879461) 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 23 ways as a sum of consecutive naturals, for example, 5237146 + ... + 5254636.

It is an arithmetic number, because the mean of its divisors is an integer number (4483374520).

Almost surely, 2^91755879481 is an apocalyptic number.

It is an amenable number.

91755879481 is a deficient number, since it is larger than the sum of its proper divisors (15845108999).

91755879481 is a wasteful number, since it uses less digits than its factorization.

91755879481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18365 (or 18358 counting only the distinct ones).

The product of its digits is 25401600, while the sum is 64.

The spelling of 91755879481 in words is "ninety-one billion, seven hundred fifty-five million, eight hundred seventy-nine thousand, four hundred eighty-one".