12091290645 has 32 divisors (see below), whose sum is σ = 22214615040. Its totient is φ = 5501240640.

The previous prime is 12091290637. The next prime is 12091290671. The reversal of 12091290645 is 54609219021.

It is not a de Polignac number, because 12091290645 - 2³ = 12091290637 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 250725 + ... + 295034.

It is an arithmetic number, because the mean of its divisors is an integer number (694206720).

Almost surely, 2^12091290645 is an apocalyptic number.

12091290645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12091290645 is a deficient number, since it is larger than the sum of its proper divisors (10123324395).

12091290645 is a wasteful number, since it uses less digits than its factorization.

12091290645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545985.

The product of its (nonzero) digits is 38880, while the sum is 39.

The spelling of 12091290645 in words is "twelve billion, ninety-one million, two hundred ninety thousand, six hundred forty-five".