78248281673249 has 2 divisors, whose sum is σ = 78248281673250. Its totient is φ = 78248281673248.

The previous prime is 78248281673207. The next prime is 78248281673279. The reversal of 78248281673249 is 94237618284287.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73563762532624 + 4684519140625 = 8576932^2 + 2164375^2 .

It is a cyclic number.

It is not a de Polignac number, because 78248281673249 - 2⁸ = 78248281672993 is a prime.

It is a super-2 number, since 2×78248281673249² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78248281673279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39124140836624 + 39124140836625.

It is an arithmetic number, because the mean of its divisors is an integer number (39124140836625).

Almost surely, 2^{78248281673249} is an apocalyptic number.

It is an amenable number.

78248281673249 is a deficient number, since it is larger than the sum of its proper divisors (1).

78248281673249 is an equidigital number, since it uses as much as digits as its factorization.

78248281673249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 520224768, while the sum is 71.

The spelling of 78248281673249 in words is "seventy-eight trillion, two hundred forty-eight billion, two hundred eighty-one million, six hundred seventy-three thousand, two hundred forty-nine".