12543887340 has 192 divisors, whose sum is σ = 40536115200. Its totient is φ = 3217992192.

The previous prime is 12543887339. The next prime is 12543887351. The reversal of 12543887340 is 4378834521.

It is a super-2 number, since 2×12543887340² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1493232 + ... + 1501608.

It is an arithmetic number, because the mean of its divisors is an integer number (211125600).

Almost surely, 2^12543887340 is an apocalyptic number.

12543887340 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 12543887340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20268057600).

12543887340 is an abundant number, since it is smaller than the sum of its proper divisors (27992227860).

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

12543887340 is a wasteful number, since it uses less digits than its factorization.

12543887340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8501 (or 8493 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 45.

The spelling of 12543887340 in words is "twelve billion, five hundred forty-three million, eight hundred eighty-seven thousand, three hundred forty".