25545355615469 has 2 divisors, whose sum is σ = 25545355615470. Its totient is φ = 25545355615468.

The previous prime is 25545355615457. The next prime is 25545355615487. The reversal of 25545355615469 is 96451655354552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24986621790244 + 558733825225 = 4998662^2 + 747485^2 .

It is a cyclic number.

It is not a de Polignac number, because 25545355615469 - 2⁴⁰ = 24445843987693 is a prime.

It is a super-2 number, since 2×25545355615469² (a number of 28 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25545355615489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12772677807734 + 12772677807735.

It is an arithmetic number, because the mean of its divisors is an integer number (12772677807735).

Almost surely, 2^{25545355615469} is an apocalyptic number.

It is an amenable number.

25545355615469 is a deficient number, since it is larger than the sum of its proper divisors (1).

25545355615469 is an equidigital number, since it uses as much as digits as its factorization.

25545355615469 is an evil number, because the sum of its binary digits is even.

The product of its digits is 486000000, while the sum is 65.

The spelling of 25545355615469 in words is "twenty-five trillion, five hundred forty-five billion, three hundred fifty-five million, six hundred fifteen thousand, four hundred sixty-nine".