25443243031040 has 40 divisors (see below), whose sum is σ = 61004150679780. Its totient is φ = 10177297211392.

The previous prime is 25443243031021. The next prime is 25443243031049. The reversal of 25443243031040 is 4013034234452.

It can be written as a sum of positive squares in 2 ways, for example, as 25375318161664 + 67924869376 = 5037392^2 + 260624^2 .

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

It is not an unprimeable number, because it can be changed into a prime (25443243031049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4969380845 + ... + 4969385964.

Almost surely, 2^{25443243031040} is an apocalyptic number.

25443243031040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25443243031040 is an abundant number, since it is smaller than the sum of its proper divisors (35560907648740).

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

25443243031040 is an frugal number, since it uses more digits than its factorization.

25443243031040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9938766832 (or 9938766816 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 35.

Adding to 25443243031040 its reverse (4013034234452), we get a palindrome (29456277265492).

The spelling of 25443243031040 in words is "twenty-five trillion, four hundred forty-three billion, two hundred forty-three million, thirty-one thousand, forty".