91023024161 has 4 divisors (see below), whose sum is σ = 91924242324. Its totient is φ = 90121806000.

The previous prime is 91023024151. The next prime is 91023024167. The reversal of 91023024161 is 16142032019.

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 47375875600 + 43647148561 = 217660^2 + 208919^2 .

It is a cyclic number.

It is not a de Polignac number, because 91023024161 - 2¹⁰ = 91023023137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91023024167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 450608930 + ... + 450609131.

It is an arithmetic number, because the mean of its divisors is an integer number (22981060581).

Almost surely, 2^91023024161 is an apocalyptic number.

It is an amenable number.

91023024161 is a deficient number, since it is larger than the sum of its proper divisors (901218163).

91023024161 is a wasteful number, since it uses less digits than its factorization.

91023024161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 901218162.

The product of its (nonzero) digits is 2592, while the sum is 29.

The spelling of 91023024161 in words is "ninety-one billion, twenty-three million, twenty-four thousand, one hundred sixty-one".