25787242253 has 2 divisors, whose sum is σ = 25787242254. Its totient is φ = 25787242252.

The previous prime is 25787242249. The next prime is 25787242259. The reversal of 25787242253 is 35224278752.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20850493609 + 4936748644 = 144397^2 + 70262^2 .

It is a cyclic number.

It is not a de Polignac number, because 25787242253 - 2² = 25787242249 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25787242198 and 25787242207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25787242259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12893621126 + 12893621127.

It is an arithmetic number, because the mean of its divisors is an integer number (12893621127).

Almost surely, 2^25787242253 is an apocalyptic number.

It is an amenable number.

25787242253 is a deficient number, since it is larger than the sum of its proper divisors (1).

25787242253 is an equidigital number, since it uses as much as digits as its factorization.

25787242253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1881600, while the sum is 47.

The spelling of 25787242253 in words is "twenty-five billion, seven hundred eighty-seven million, two hundred forty-two thousand, two hundred fifty-three".