91145839103089 has 9 divisors (see below), whose sum is σ = 91425205848249. Its totient is φ = 90867323509380.

The previous prime is 91145839103057. The next prime is 91145839103153. The reversal of 91145839103089 is 98030193854119.

The square root of 91145839103089 is 9547033.

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

It is not a de Polignac number, because 91145839103089 - 2⁵ = 91145839103057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91145839103789) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3160053502 + ... + 3160082344.

It is an arithmetic number, because the mean of its divisors is an integer number (10158356205361).

Almost surely, 2^{91145839103089} is an apocalyptic number.

91145839103089 is the 9547033-rd square number.

91145839103089 is the 4773517-th centered octagonal number.

It is an amenable number.

91145839103089 is a deficient number, since it is larger than the sum of its proper divisors (279366745160).

91145839103089 is an frugal number, since it uses more digits than its factorization.

91145839103089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58348 (or 29174 counting only the distinct ones).

The product of its (nonzero) digits is 8398080, while the sum is 61.

The spelling of 91145839103089 in words is "ninety-one trillion, one hundred forty-five billion, eight hundred thirty-nine million, one hundred three thousand, eighty-nine".