12909367440 has 160 divisors (see below), whose sum is σ = 44651904000. Its totient is φ = 3428075520.

The previous prime is 12909367423. The next prime is 12909367453. The reversal of 12909367440 is 4476390921.

It is a happy number.

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 31 ways as a sum of consecutive naturals, for example, 508161 + ... + 532959.

It is an arithmetic number, because the mean of its divisors is an integer number (279074400).

Almost surely, 2^12909367440 is an apocalyptic number.

12909367440 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 12909367440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22325952000).

12909367440 is an abundant number, since it is smaller than the sum of its proper divisors (31742536560).

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

12909367440 is a wasteful number, since it uses less digits than its factorization.

12909367440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25062 (or 25050 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The spelling of 12909367440 in words is "twelve billion, nine hundred nine million, three hundred sixty-seven thousand, four hundred forty".