25520099191 has 2 divisors, whose sum is σ = 25520099192. Its totient is φ = 25520099190.

The previous prime is 25520099173. The next prime is 25520099221. The reversal of 25520099191 is 19199002552.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25520099191 - 2¹⁹ = 25519574903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25520099131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12760049595 + 12760049596.

It is an arithmetic number, because the mean of its divisors is an integer number (12760049596).

Almost surely, 2^25520099191 is an apocalyptic number.

25520099191 is a deficient number, since it is larger than the sum of its proper divisors (1).

25520099191 is an equidigital number, since it uses as much as digits as its factorization.

25520099191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72900, while the sum is 43.

The spelling of 25520099191 in words is "twenty-five billion, five hundred twenty million, ninety-nine thousand, one hundred ninety-one".