25649041427 has 2 divisors, whose sum is σ = 25649041428. Its totient is φ = 25649041426.

The previous prime is 25649041403. The next prime is 25649041471. The reversal of 25649041427 is 72414094652.

It is an a-pointer prime, because the next prime (25649041471) can be obtained adding 25649041427 to its sum of digits (44).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25649041427 is a prime.

It is a super-2 number, since 2×25649041427² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25649041727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12824520713 + 12824520714.

It is an arithmetic number, because the mean of its divisors is an integer number (12824520714).

Almost surely, 2^25649041427 is an apocalyptic number.

25649041427 is a deficient number, since it is larger than the sum of its proper divisors (1).

25649041427 is an equidigital number, since it uses as much as digits as its factorization.

25649041427 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 483840, while the sum is 44.

The spelling of 25649041427 in words is "twenty-five billion, six hundred forty-nine million, forty-one thousand, four hundred twenty-seven".