25545305146409 has 2 divisors, whose sum is σ = 25545305146410. Its totient is φ = 25545305146408.

The previous prime is 25545305146351. The next prime is 25545305146423. The reversal of 25545305146409 is 90464150354552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23145913440400 + 2399391706009 = 4811020^2 + 1548997^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25545305146409 is a prime.

It is a super-3 number, since 3×25545305146409³ (a number of 41 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (25545305146609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12772652573204 + 12772652573205.

It is an arithmetic number, because the mean of its divisors is an integer number (12772652573205).

Almost surely, 2^{25545305146409} is an apocalyptic number.

It is an amenable number.

25545305146409 is a deficient number, since it is larger than the sum of its proper divisors (1).

25545305146409 is an equidigital number, since it uses as much as digits as its factorization.

25545305146409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960000, while the sum is 53.

The spelling of 25545305146409 in words is "twenty-five trillion, five hundred forty-five billion, three hundred five million, one hundred forty-six thousand, four hundred nine".