12115175772 has 96 divisors (see below), whose sum is σ = 33187359744. Its totient is φ = 3367641600.

The previous prime is 12115175747. The next prime is 12115175797. The reversal of 12115175772 is 27757151121.

It is an interprime number because it is at equal distance from previous prime (12115175747) and next prime (12115175797).

It is a self number, because there is not a number n which added to its sum of digits gives 12115175772.

It is a congruent number.

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, 1279897 + ... + 1289327.

It is an arithmetic number, because the mean of its divisors is an integer number (345701664).

Almost surely, 2^12115175772 is an apocalyptic number.

12115175772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12115175772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16593679872).

12115175772 is an abundant number, since it is smaller than the sum of its proper divisors (21072183972).

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

12115175772 is a wasteful number, since it uses less digits than its factorization.

12115175772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9859 (or 9857 counting only the distinct ones).

The product of its digits is 34300, while the sum is 39.

The spelling of 12115175772 in words is "twelve billion, one hundred fifteen million, one hundred seventy-five thousand, seven hundred seventy-two".