91352848981 has 4 divisors (see below), whose sum is σ = 91965955500. Its totient is φ = 90739742464.

The previous prime is 91352848967. The next prime is 91352848987. The reversal of 91352848981 is 18984825319.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 24784204900 + 66568644081 = 157430^2 + 258009^2 .

It is a cyclic number.

It is not a de Polignac number, because 91352848981 - 2¹⁵ = 91352816213 is a prime.

It is a super-2 number, since 2×91352848981² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91352848987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 306553036 + ... + 306553333.

It is an arithmetic number, because the mean of its divisors is an integer number (22991488875).

Almost surely, 2^91352848981 is an apocalyptic number.

It is an amenable number.

91352848981 is a deficient number, since it is larger than the sum of its proper divisors (613106519).

91352848981 is a wasteful number, since it uses less digits than its factorization.

91352848981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 613106518.

The product of its digits is 4976640, while the sum is 58.

The spelling of 91352848981 in words is "ninety-one billion, three hundred fifty-two million, eight hundred forty-eight thousand, nine hundred eighty-one".