12431440545 has 64 divisors (see below), whose sum is σ = 21264629760. Its totient is φ = 6187027968.

The previous prime is 12431440507. The next prime is 12431440579. The reversal of 12431440545 is 54504413421.

It is a happy number.

It is not a de Polignac number, because 12431440545 - 2¹⁰ = 12431439521 is a prime.

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, 5949861 + ... + 5951949.

It is an arithmetic number, because the mean of its divisors is an integer number (332259840).

Almost surely, 2^12431440545 is an apocalyptic number.

12431440545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12431440545 is a deficient number, since it is larger than the sum of its proper divisors (8833189215).

12431440545 is a wasteful number, since it uses less digits than its factorization.

12431440545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2534.

The product of its (nonzero) digits is 38400, while the sum is 33.

Adding to 12431440545 its reverse (54504413421), we get a palindrome (66935853966).

The spelling of 12431440545 in words is "twelve billion, four hundred thirty-one million, four hundred forty thousand, five hundred forty-five".