12543415500 has 384 divisors, whose sum is σ = 45837582336. Its totient is φ = 2589408000.

The previous prime is 12543415487. The next prime is 12543415531. The reversal of 12543415500 is 551434521.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 25756257 + ... + 25756743.

It is an arithmetic number, because the mean of its divisors is an integer number (119368704).

Almost surely, 2^12543415500 is an apocalyptic number.

12543415500 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 12543415500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22918791168).

12543415500 is an abundant number, since it is smaller than the sum of its proper divisors (33294166836).

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

12543415500 is a wasteful number, since it uses less digits than its factorization.

12543415500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 750 (or 738 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 30.

The spelling of 12543415500 in words is "twelve billion, five hundred forty-three million, four hundred fifteen thousand, five hundred".