2545431440 has 40 divisors (see below), whose sum is σ = 6055767168. Its totient is φ = 994492800.

The previous prime is 2545431439. The next prime is 2545431443. The reversal of 2545431440 is 441345452.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 2545431397 and 2545431406.

It is not an unprimeable number, because it can be changed into a prime (2545431443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 366536 + ... + 373415.

Almost surely, 2^2545431440 is an apocalyptic number.

2545431440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2545431440 is an abundant number, since it is smaller than the sum of its proper divisors (3510335728).

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

2545431440 is a wasteful number, since it uses less digits than its factorization.

2545431440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 740007 (or 740001 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 32.

The square root of 2545431440 is about 50452.2689281662. The cubic root of 2545431440 is about 1365.3808309138.

Adding to 2545431440 its reverse (441345452), we get a palindrome (2986776892).

The spelling of 2545431440 in words is "two billion, five hundred forty-five million, four hundred thirty-one thousand, four hundred forty".