12149197557 has 8 divisors (see below), whose sum is σ = 18513062976. Its totient is φ = 6942398592.

The previous prime is 12149197549. The next prime is 12149197573. The reversal of 12149197557 is 75579194121.

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

It is not a de Polignac number, because 12149197557 - 2³ = 12149197549 is a prime.

It is a super-3 number, since 3×12149197557³ (a number of 31 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12149197547) 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, 289266588 + ... + 289266629.

It is an arithmetic number, because the mean of its divisors is an integer number (2314132872).

Almost surely, 2^12149197557 is an apocalyptic number.

It is an amenable number.

12149197557 is a deficient number, since it is larger than the sum of its proper divisors (6363865419).

12149197557 is an equidigital number, since it uses as much as digits as its factorization.

12149197557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 578533227.

The product of its digits is 793800, while the sum is 51.

The spelling of 12149197557 in words is "twelve billion, one hundred forty-nine million, one hundred ninety-seven thousand, five hundred fifty-seven".