12171765452 has 24 divisors (see below), whose sum is σ = 26556579840. Its totient is φ = 4742246160.

The previous prime is 12171765443. The next prime is 12171765461. The reversal of 12171765452 is 25456717121.

It is an interprime number because it is at equal distance from previous prime (12171765443) and next prime (12171765461).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19759052 + ... + 19759667.

It is an arithmetic number, because the mean of its divisors is an integer number (1106524160).

Almost surely, 2^12171765452 is an apocalyptic number.

It is an amenable number.

12171765452 is an abundant number, since it is smaller than the sum of its proper divisors (14384814388).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12171765452 is a wasteful number, since it uses less digits than its factorization.

12171765452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39518741 (or 39518739 counting only the distinct ones).

The product of its digits is 117600, while the sum is 41.

The spelling of 12171765452 in words is "twelve billion, one hundred seventy-one million, seven hundred sixty-five thousand, four hundred fifty-two".