91442090041 has 4 divisors (see below), whose sum is σ = 96821036532. Its totient is φ = 86063143552.

The previous prime is 91442090021. The next prime is 91442090053. The reversal of 91442090041 is 14009024419.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14009024419 = 13 ⋅1077617263.

It can be written as a sum of positive squares in 2 ways, for example, as 43216173225 + 48225916816 = 207885^2 + 219604^2 .

It is not a de Polignac number, because 91442090041 - 2¹¹ = 91442087993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 91442089979 and 91442090006.

It is not an unprimeable number, because it can be changed into a prime (91442090021) 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, 2689473220 + ... + 2689473253.

It is an arithmetic number, because the mean of its divisors is an integer number (24205259133).

Almost surely, 2^91442090041 is an apocalyptic number.

It is an amenable number.

91442090041 is a deficient number, since it is larger than the sum of its proper divisors (5378946491).

91442090041 is a wasteful number, since it uses less digits than its factorization.

91442090041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5378946490.

The product of its (nonzero) digits is 10368, while the sum is 34.

The spelling of 91442090041 in words is "ninety-one billion, four hundred forty-two million, ninety thousand, forty-one".