25234415440397 has 2 divisors, whose sum is σ = 25234415440398. Its totient is φ = 25234415440396.

The previous prime is 25234415440387. The next prime is 25234415440447. The reversal of 25234415440397 is 79304451443252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24616075408681 + 618340031716 = 4961459^2 + 786346^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25234415440397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25234415440387) 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, 12617207720198 + 12617207720199.

It is an arithmetic number, because the mean of its divisors is an integer number (12617207720199).

Almost surely, 2^{25234415440397} is an apocalyptic number.

It is an amenable number.

25234415440397 is a deficient number, since it is larger than the sum of its proper divisors (1).

25234415440397 is an equidigital number, since it uses as much as digits as its factorization.

25234415440397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14515200, while the sum is 53.

The spelling of 25234415440397 in words is "twenty-five trillion, two hundred thirty-four billion, four hundred fifteen million, four hundred forty thousand, three hundred ninety-seven".