25943198447 has 2 divisors, whose sum is σ = 25943198448. Its totient is φ = 25943198446.

The previous prime is 25943198429. The next prime is 25943198453. The reversal of 25943198447 is 74489134952.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25943198447 - 2⁶ = 25943198383 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25943198392 and 25943198401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25943198497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12971599223 + 12971599224.

It is an arithmetic number, because the mean of its divisors is an integer number (12971599224).

Almost surely, 2^25943198447 is an apocalyptic number.

25943198447 is a deficient number, since it is larger than the sum of its proper divisors (1).

25943198447 is an equidigital number, since it uses as much as digits as its factorization.

25943198447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8709120, while the sum is 56.

The spelling of 25943198447 in words is "twenty-five billion, nine hundred forty-three million, one hundred ninety-eight thousand, four hundred forty-seven".