25234415440447 has 2 divisors, whose sum is σ = 25234415440448. Its totient is φ = 25234415440446.

The previous prime is 25234415440397. The next prime is 25234415440463. The reversal of 25234415440447 is 74404451443252.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25234415440447 is a prime.

It is a super-2 number, since 2×25234415440447² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25234415440447.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25234415740447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12617207720223 + 12617207720224.

It is an arithmetic number, because the mean of its divisors is an integer number (12617207720224).

Almost surely, 2^{25234415440447} is an apocalyptic number.

25234415440447 is a deficient number, since it is larger than the sum of its proper divisors (1).

25234415440447 is an equidigital number, since it uses as much as digits as its factorization.

25234415440447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8601600, while the sum is 49.

Adding to 25234415440447 its reverse (74404451443252), we get a palindrome (99638866883699).

The spelling of 25234415440447 in words is "twenty-five trillion, two hundred thirty-four billion, four hundred fifteen million, four hundred forty thousand, four hundred forty-seven".