12312146500 has 48 divisors (see below), whose sum is σ = 27030721536. Its totient is φ = 4899036000.

The previous prime is 12312146479. The next prime is 12312146513. The reversal of 12312146500 is 564121321.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31039 + ... + 159961.

It is an arithmetic number, because the mean of its divisors is an integer number (563140032).

Almost surely, 2^12312146500 is an apocalyptic number.

12312146500 is a gapful number since it is divisible by the number (10) 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 12312146500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13515360768).

12312146500 is an abundant number, since it is smaller than the sum of its proper divisors (14718575036).

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

12312146500 is a wasteful number, since it uses less digits than its factorization.

12312146500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129133 (or 129121 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

Adding to 12312146500 its reverse (564121321), we get a palindrome (12876267821).

The spelling of 12312146500 in words is "twelve billion, three hundred twelve million, one hundred forty-six thousand, five hundred".