91481460981121 has 4 divisors (see below), whose sum is σ = 93712716127044. Its totient is φ = 89250205835200.

The previous prime is 91481460981109. The next prime is 91481460981179. The reversal of 91481460981121 is 12118906418419.

It is a happy number.

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 49045356491121 + 42436104490000 = 7003239^2 + 6514300^2 .

It is a cyclic number.

It is not a de Polignac number, because 91481460981121 - 2⁵ = 91481460981089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91481460981221) 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, 1115627572900 + ... + 1115627572981.

It is an arithmetic number, because the mean of its divisors is an integer number (23428179031761).

Almost surely, 2^{91481460981121} is an apocalyptic number.

It is an amenable number.

91481460981121 is a deficient number, since it is larger than the sum of its proper divisors (2231255145923).

91481460981121 is a wasteful number, since it uses less digits than its factorization.

91481460981121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2231255145922.

The product of its (nonzero) digits is 995328, while the sum is 55.

The spelling of 91481460981121 in words is "ninety-one trillion, four hundred eighty-one billion, four hundred sixty million, nine hundred eighty-one thousand, one hundred twenty-one".