25401599999 has 2 divisors, whose sum is σ = 25401600000. Its totient is φ = 25401599998.

The previous prime is 25401599983. The next prime is 25401600011. The reversal of 25401599999 is 99999510452.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25401599999 - 2⁴ = 25401599983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25401599929) 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, 12700799999 + 12700800000.

It is an arithmetic number, because the mean of its divisors is an integer number (12700800000).

Almost surely, 2^25401599999 is an apocalyptic number.

25401599999 is a deficient number, since it is larger than the sum of its proper divisors (1).

25401599999 is an equidigital number, since it uses as much as digits as its factorization.

25401599999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11809800, while the sum is 62.

The spelling of 25401599999 in words is "twenty-five billion, four hundred one million, five hundred ninety-nine thousand, nine hundred ninety-nine".