12109309537 has 8 divisors (see below), whose sum is σ = 13607786304. Its totient is φ = 10691831568.

The previous prime is 12109309481. The next prime is 12109309543. The reversal of 12109309537 is 73590390121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12109309537 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12109309537.

It is not an unprimeable number, because it can be changed into a prime (12109309337) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20249383 + ... + 20249980.

It is an arithmetic number, because the mean of its divisors is an integer number (1700973288).

Almost surely, 2^12109309537 is an apocalyptic number.

It is an amenable number.

12109309537 is a deficient number, since it is larger than the sum of its proper divisors (1498476767).

12109309537 is a wasteful number, since it uses less digits than its factorization.

12109309537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40499399.

The product of its (nonzero) digits is 51030, while the sum is 40.

Adding to 12109309537 its reverse (73590390121), we get a palindrome (85699699658).

The spelling of 12109309537 in words is "twelve billion, one hundred nine million, three hundred nine thousand, five hundred thirty-seven".