91671344353 has 4 divisors (see below), whose sum is σ = 91725365700. Its totient is φ = 91617323008.

The previous prime is 91671344351. The next prime is 91671344383. The reversal of 91671344353 is 35344317619.

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 66898787904 + 24772556449 = 258648^2 + 157393^2 .

It is a cyclic number.

It is not a de Polignac number, because 91671344353 - 2¹ = 91671344351 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91671344351) 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, 27008128 + ... + 27011521.

It is an arithmetic number, because the mean of its divisors is an integer number (22931341425).

Almost surely, 2^91671344353 is an apocalyptic number.

It is an amenable number.

91671344353 is a deficient number, since it is larger than the sum of its proper divisors (54021347).

91671344353 is a wasteful number, since it uses less digits than its factorization.

91671344353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54021346.

The product of its digits is 816480, while the sum is 46.

The spelling of 91671344353 in words is "ninety-one billion, six hundred seventy-one million, three hundred forty-four thousand, three hundred fifty-three".