25623240247 has 16 divisors (see below), whose sum is σ = 28964136960. Its totient is φ = 22456648800.

The previous prime is 25623240241. The next prime is 25623240257. The reversal of 25623240247 is 74204232652.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 25623240247 - 2¹⁹ = 25622715959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25623240241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53172 + ... + 232537.

It is an arithmetic number, because the mean of its divisors is an integer number (1810258560).

Almost surely, 2^25623240247 is an apocalyptic number.

25623240247 is a deficient number, since it is larger than the sum of its proper divisors (3340896713).

25623240247 is a wasteful number, since it uses less digits than its factorization.

25623240247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286014.

The product of its (nonzero) digits is 161280, while the sum is 37.

Adding to 25623240247 its reverse (74204232652), we get a palindrome (99827472899).

The spelling of 25623240247 in words is "twenty-five billion, six hundred twenty-three million, two hundred forty thousand, two hundred forty-seven".