12591217090 has 8 divisors (see below), whose sum is σ = 22664190780. Its totient is φ = 5036486832.

The previous prime is 12591217073. The next prime is 12591217097. The reversal of 12591217090 is 9071219521.

It can be written as a sum of positive squares in 2 ways, for example, as 12107261089 + 483956001 = 110033^2 + 21999^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (12591217097) 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, 629560845 + ... + 629560864.

Almost surely, 2^12591217090 is an apocalyptic number.

12591217090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12591217090 is a deficient number, since it is larger than the sum of its proper divisors (10072973690).

12591217090 is a wasteful number, since it uses less digits than its factorization.

12591217090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1259121716.

The product of its (nonzero) digits is 11340, while the sum is 37.

The spelling of 12591217090 in words is "twelve billion, five hundred ninety-one million, two hundred seventeen thousand, ninety".