258252778193 has 2 divisors, whose sum is σ = 258252778194. Its totient is φ = 258252778192.

The previous prime is 258252778153. The next prime is 258252778339. The reversal of 258252778193 is 391877252852.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 162321963664 + 95930814529 = 402892^2 + 309727^2 .

It is a cyclic number.

It is not a de Polignac number, because 258252778193 - 2¹⁶ = 258252712657 is a prime.

It is not a weakly prime, because it can be changed into another prime (258252778153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129126389096 + 129126389097.

It is an arithmetic number, because the mean of its divisors is an integer number (129126389097).

Almost surely, 2^258252778193 is an apocalyptic number.

It is an amenable number.

258252778193 is a deficient number, since it is larger than the sum of its proper divisors (1).

258252778193 is an equidigital number, since it uses as much as digits as its factorization.

258252778193 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16934400, while the sum is 59.

The spelling of 258252778193 in words is "two hundred fifty-eight billion, two hundred fifty-two million, seven hundred seventy-eight thousand, one hundred ninety-three".