25335131749 has 2 divisors, whose sum is σ = 25335131750. Its totient is φ = 25335131748.

The previous prime is 25335131737. The next prime is 25335131819. The reversal of 25335131749 is 94713153352.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25335088900 + 42849 = 159170^2 + 207^2 .

It is a cyclic number.

It is not a de Polignac number, because 25335131749 - 2¹⁵ = 25335098981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25335131719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12667565874 + 12667565875.

It is an arithmetic number, because the mean of its divisors is an integer number (12667565875).

Almost surely, 2^25335131749 is an apocalyptic number.

It is an amenable number.

25335131749 is a deficient number, since it is larger than the sum of its proper divisors (1).

25335131749 is an equidigital number, since it uses as much as digits as its factorization.

25335131749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 340200, while the sum is 43.

The spelling of 25335131749 in words is "twenty-five billion, three hundred thirty-five million, one hundred thirty-one thousand, seven hundred forty-nine".