25560005437 has 2 divisors, whose sum is σ = 25560005438. Its totient is φ = 25560005436.

The previous prime is 25560005423. The next prime is 25560005491. The reversal of 25560005437 is 73450006552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18276065721 + 7283939716 = 135189^2 + 85346^2 .

It is a cyclic number.

It is not a de Polignac number, because 25560005437 - 2¹⁹ = 25559481149 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25560005396 and 25560005405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25560005137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12780002718 + 12780002719.

It is an arithmetic number, because the mean of its divisors is an integer number (12780002719).

Almost surely, 2^25560005437 is an apocalyptic number.

It is an amenable number.

25560005437 is a deficient number, since it is larger than the sum of its proper divisors (1).

25560005437 is an equidigital number, since it uses as much as digits as its factorization.

25560005437 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 126000, while the sum is 37.

The spelling of 25560005437 in words is "twenty-five billion, five hundred sixty million, five thousand, four hundred thirty-seven".