4043540025 has 108 divisors (see below), whose sum is σ = 8697371904. Its totient is φ = 1788696000.

The previous prime is 4043540021. The next prime is 4043540063. The reversal of 4043540025 is 5200453404.

It is not a de Polignac number, because 4043540025 - 2² = 4043540021 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4043540021) by changing a digit.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 335860 + ... + 347690.

Almost surely, 2^4043540025 is an apocalyptic number.

4043540025 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

4043540025 is an abundant number, since it is smaller than the sum of its proper divisors (4653831879).

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

4043540025 is a wasteful number, since it uses less digits than its factorization.

4043540025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11892 (or 11877 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 27.

The square root of 4043540025 is about 63588.8356946406. The cubic root of 4043540025 is about 1593.1399030439.

Adding to 4043540025 its reverse (5200453404), we get a palindrome (9243993429).

The spelling of 4043540025 in words is "four billion, forty-three million, five hundred forty thousand, twenty-five".