12453043440 has 160 divisors (see below), whose sum is σ = 39269915136. Its totient is φ = 3263800320.

The previous prime is 12453043429. The next prime is 12453043453. The reversal of 12453043440 is 4434035421.

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

It is a junction number, because it is equal to n+sod(n) for n = 12453043398 and 12453043407.

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, 13233370 + ... + 13234310.

Almost surely, 2^12453043440 is an apocalyptic number.

12453043440 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 12453043440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19634957568).

12453043440 is an abundant number, since it is smaller than the sum of its proper divisors (26816871696).

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

12453043440 is a wasteful number, since it uses less digits than its factorization.

12453043440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1847 (or 1841 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 30.

Adding to 12453043440 its reverse (4434035421), we get a palindrome (16887078861).

The spelling of 12453043440 in words is "twelve billion, four hundred fifty-three million, forty-three thousand, four hundred forty".