25109247349 has 2 divisors, whose sum is σ = 25109247350. Its totient is φ = 25109247348.

The previous prime is 25109247337. The next prime is 25109247421. The reversal of 25109247349 is 94374290152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12812655249 + 12296592100 = 113193^2 + 110890^2 .

It is a cyclic number.

It is not a de Polignac number, because 25109247349 - 2⁹ = 25109246837 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25109247299 and 25109247308.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25109247329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12554623674 + 12554623675.

It is an arithmetic number, because the mean of its divisors is an integer number (12554623675).

Almost surely, 2^25109247349 is an apocalyptic number.

It is an amenable number.

25109247349 is a deficient number, since it is larger than the sum of its proper divisors (1).

25109247349 is an equidigital number, since it uses as much as digits as its factorization.

25109247349 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 544320, while the sum is 46.

The spelling of 25109247349 in words is "twenty-five billion, one hundred nine million, two hundred forty-seven thousand, three hundred forty-nine".