25606012403 has 2 divisors, whose sum is σ = 25606012404. Its totient is φ = 25606012402.

The previous prime is 25606012361. The next prime is 25606012427. The reversal of 25606012403 is 30421060652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25606012403 - 2⁶ = 25606012339 is a prime.

It is not a weakly prime, because it can be changed into another prime (25606012433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12803006201 + 12803006202.

It is an arithmetic number, because the mean of its divisors is an integer number (12803006202).

Almost surely, 2^25606012403 is an apocalyptic number.

25606012403 is a deficient number, since it is larger than the sum of its proper divisors (1).

25606012403 is an equidigital number, since it uses as much as digits as its factorization.

25606012403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 29.

The spelling of 25606012403 in words is "twenty-five billion, six hundred six million, twelve thousand, four hundred three".