91448922529449 has 9 divisors (see below), whose sum is σ = 132092929537309. Its totient is φ = 60965929227180.

The previous prime is 91448922529427. The next prime is 91448922529457. The reversal of 91448922529449 is 94492522984419.

It is a happy number.

The square root of 91448922529449 is 9562893.

It is a perfect power (a square), and thus also a powerful number.

91448922529449 is a `hidden beast` number, since 9 + 1 + 4 + 4 + 8 + 92 + 2 + 529 + 4 + 4 + 9 = 666.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 91448922529449 - 2²¹ = 91448920432297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91448922529949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 27094864 + ... + 30282494.

Almost surely, 2^{91448922529449} is an apocalyptic number.

91448922529449 is the 9562893-rd square number.

91448922529449 is the 4781447-th centered octagonal number.

It is an amenable number.

91448922529449 is a deficient number, since it is larger than the sum of its proper divisors (40644007007860).

91448922529449 is an frugal number, since it uses more digits than its factorization.

91448922529449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6375268 (or 3187634 counting only the distinct ones).

The product of its digits is 537477120, while the sum is 72.

The spelling of 91448922529449 in words is "ninety-one trillion, four hundred forty-eight billion, nine hundred twenty-two million, five hundred twenty-nine thousand, four hundred forty-nine".