12345841091 has 4 divisors (see below), whose sum is σ = 12348331632. Its totient is φ = 12343350552.

The previous prime is 12345841049. The next prime is 12345841117. The reversal of 12345841091 is 19014854321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19014854321 = 16843 ⋅1128947.

It is a cyclic number.

It is not a de Polignac number, because 12345841091 - 2¹⁴ = 12345824707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12345841021) 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, 1237820 + ... + 1247753.

It is an arithmetic number, because the mean of its divisors is an integer number (3087082908).

Almost surely, 2^12345841091 is an apocalyptic number.

12345841091 is a deficient number, since it is larger than the sum of its proper divisors (2490541).

12345841091 is an equidigital number, since it uses as much as digits as its factorization.

12345841091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2490540.

The product of its (nonzero) digits is 34560, while the sum is 38.

The spelling of 12345841091 in words is "twelve billion, three hundred forty-five million, eight hundred forty-one thousand, ninety-one".