25440000007 has 2 divisors, whose sum is σ = 25440000008. Its totient is φ = 25440000006.

The previous prime is 25439999993. The next prime is 25440000029. The reversal of 25440000007 is 70000004452.

It is an a-pointer prime, because the next prime (25440000029) can be obtained adding 25440000007 to its sum of digits (22).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25440000007 - 2¹⁵ = 25439967239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25440000307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12720000003 + 12720000004.

It is an arithmetic number, because the mean of its divisors is an integer number (12720000004).

Almost surely, 2^25440000007 is an apocalyptic number.

25440000007 is a deficient number, since it is larger than the sum of its proper divisors (1).

25440000007 is an equidigital number, since it uses as much as digits as its factorization.

25440000007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1120, while the sum is 22.

Adding to 25440000007 its reverse (70000004452), we get a palindrome (95440004459).

The spelling of 25440000007 in words is "twenty-five billion, four hundred forty million, seven", and thus it is an aban number.