25027780302649 has 2 divisors, whose sum is σ = 25027780302650. Its totient is φ = 25027780302648.

The previous prime is 25027780302599. The next prime is 25027780302661. The reversal of 25027780302649 is 94620308772052.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21036275787024 + 3991504515625 = 4586532^2 + 1997875^2 .

It is a cyclic number.

It is not a de Polignac number, because 25027780302649 - 2⁷ = 25027780302521 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25027780302649.

It is not a weakly prime, because it can be changed into another prime (25027780312649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12513890151324 + 12513890151325.

It is an arithmetic number, because the mean of its divisors is an integer number (12513890151325).

Almost surely, 2^{25027780302649} is an apocalyptic number.

It is an amenable number.

25027780302649 is a deficient number, since it is larger than the sum of its proper divisors (1).

25027780302649 is an equidigital number, since it uses as much as digits as its factorization.

25027780302649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10160640, while the sum is 55.

The spelling of 25027780302649 in words is "twenty-five trillion, twenty-seven billion, seven hundred eighty million, three hundred two thousand, six hundred forty-nine".