91474532449 has 4 divisors (see below), whose sum is σ = 92417568964. Its totient is φ = 90531495936.

The previous prime is 91474532423. The next prime is 91474532477. The reversal of 91474532449 is 94423547419.

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 16832467600 + 74642064849 = 129740^2 + 273207^2 .

It is a cyclic number.

It is not a de Polignac number, because 91474532449 - 2¹¹ = 91474530401 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 91474532396 and 91474532405.

It is not an unprimeable number, because it can be changed into a prime (91474532419) 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, 471518112 + ... + 471518305.

It is an arithmetic number, because the mean of its divisors is an integer number (23104392241).

Almost surely, 2^91474532449 is an apocalyptic number.

It is an amenable number.

91474532449 is a deficient number, since it is larger than the sum of its proper divisors (943036515).

91474532449 is an equidigital number, since it uses as much as digits as its factorization.

91474532449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 943036514.

The product of its digits is 4354560, while the sum is 52.

The spelling of 91474532449 in words is "ninety-one billion, four hundred seventy-four million, five hundred thirty-two thousand, four hundred forty-nine".