25656238123 has 2 divisors, whose sum is σ = 25656238124. Its totient is φ = 25656238122.

The previous prime is 25656238063. The next prime is 25656238151. The reversal of 25656238123 is 32183265652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25656238123 - 2¹³ = 25656229931 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25656238123.

It is not a weakly prime, because it can be changed into another prime (25656238163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12828119061 + 12828119062.

It is an arithmetic number, because the mean of its divisors is an integer number (12828119062).

Almost surely, 2^25656238123 is an apocalyptic number.

25656238123 is a deficient number, since it is larger than the sum of its proper divisors (1).

25656238123 is an equidigital number, since it uses as much as digits as its factorization.

25656238123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 518400, while the sum is 43.

The spelling of 25656238123 in words is "twenty-five billion, six hundred fifty-six million, two hundred thirty-eight thousand, one hundred twenty-three".