12149197555 has 32 divisors (see below), whose sum is σ = 16261337088. Its totient is φ = 8637916800.

The previous prime is 12149197549. The next prime is 12149197573. The reversal of 12149197555 is 55579194121.

It is not a de Polignac number, because 12149197555 - 2³ = 12149197547 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12149197499 and 12149197508.

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, 2849125 + ... + 2853385.

It is an arithmetic number, because the mean of its divisors is an integer number (508166784).

Almost surely, 2^12149197555 is an apocalyptic number.

12149197555 is a deficient number, since it is larger than the sum of its proper divisors (4112139533).

12149197555 is a wasteful number, since it uses less digits than its factorization.

12149197555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5427.

The product of its digits is 567000, while the sum is 49.

The spelling of 12149197555 in words is "twelve billion, one hundred forty-nine million, one hundred ninety-seven thousand, five hundred fifty-five".