25505144099 has 2 divisors, whose sum is σ = 25505144100. Its totient is φ = 25505144098.

The previous prime is 25505144059. The next prime is 25505144111. The reversal of 25505144099 is 99044150552.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25505144099 is a prime.

It is not a weakly prime, because it can be changed into another prime (25505144039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12752572049 + 12752572050.

It is an arithmetic number, because the mean of its divisors is an integer number (12752572050).

Almost surely, 2^25505144099 is an apocalyptic number.

25505144099 is a deficient number, since it is larger than the sum of its proper divisors (1).

25505144099 is an equidigital number, since it uses as much as digits as its factorization.

25505144099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324000, while the sum is 44.

The spelling of 25505144099 in words is "twenty-five billion, five hundred five million, one hundred forty-four thousand, ninety-nine".