25649041471 has 2 divisors, whose sum is σ = 25649041472. Its totient is φ = 25649041470.

The previous prime is 25649041427. The next prime is 25649041501. The reversal of 25649041471 is 17414094652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25649041471 - 2⁷ = 25649041343 is a prime.

It is a super-3 number, since 3×25649041471³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25649141471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12824520735 + 12824520736.

It is an arithmetic number, because the mean of its divisors is an integer number (12824520736).

Almost surely, 2^25649041471 is an apocalyptic number.

25649041471 is a deficient number, since it is larger than the sum of its proper divisors (1).

25649041471 is an equidigital number, since it uses as much as digits as its factorization.

25649041471 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 241920, while the sum is 43.

The spelling of 25649041471 in words is "twenty-five billion, six hundred forty-nine million, forty-one thousand, four hundred seventy-one".