25164341549 has 2 divisors, whose sum is σ = 25164341550. Its totient is φ = 25164341548.

The previous prime is 25164341519. The next prime is 25164341567. The reversal of 25164341549 is 94514346152.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22317372100 + 2846969449 = 149390^2 + 53357^2 .

It is a cyclic number.

It is not a de Polignac number, because 25164341549 - 2¹⁶ = 25164276013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25164341519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12582170774 + 12582170775.

It is an arithmetic number, because the mean of its divisors is an integer number (12582170775).

Almost surely, 2^25164341549 is an apocalyptic number.

It is an amenable number.

25164341549 is a deficient number, since it is larger than the sum of its proper divisors (1).

25164341549 is an equidigital number, since it uses as much as digits as its factorization.

25164341549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 518400, while the sum is 44.

The spelling of 25164341549 in words is "twenty-five billion, one hundred sixty-four million, three hundred forty-one thousand, five hundred forty-nine".