12171877148 has 6 divisors (see below), whose sum is σ = 21300785016. Its totient is φ = 6085938572.

The previous prime is 12171877019. The next prime is 12171877241. The reversal of 12171877148 is 84177817121.

It is a super-4 number, since 4×12171877148⁴ (a number of 41 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1521484640 + ... + 1521484647.

It is an arithmetic number, because the mean of its divisors is an integer number (3550130836).

Almost surely, 2^12171877148 is an apocalyptic number.

It is an amenable number.

12171877148 is a deficient number, since it is larger than the sum of its proper divisors (9128907868).

12171877148 is a wasteful number, since it uses less digits than its factorization.

12171877148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3042969291 (or 3042969289 counting only the distinct ones).

The product of its digits is 175616, while the sum is 47.

The spelling of 12171877148 in words is "twelve billion, one hundred seventy-one million, eight hundred seventy-seven thousand, one hundred forty-eight".