7871358514249 has 2 divisors, whose sum is σ = 7871358514250. Its totient is φ = 7871358514248.

The previous prime is 7871358514157. The next prime is 7871358514291. The reversal of 7871358514249 is 9424158531787.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6535385473600 + 1335973040649 = 2556440^2 + 1155843^2 .

It is a cyclic number.

It is not a de Polignac number, because 7871358514249 - 2¹³ = 7871358506057 is a prime.

It is not a weakly prime, because it can be changed into another prime (7871358514549) 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, 3935679257124 + 3935679257125.

It is an arithmetic number, because the mean of its divisors is an integer number (3935679257125).

Almost surely, 2^{7871358514249} is an apocalyptic number.

It is an amenable number.

7871358514249 is a deficient number, since it is larger than the sum of its proper divisors (1).

7871358514249 is an equidigital number, since it uses as much as digits as its factorization.

7871358514249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 67737600, while the sum is 64.

The spelling of 7871358514249 in words is "seven trillion, eight hundred seventy-one billion, three hundred fifty-eight million, five hundred fourteen thousand, two hundred forty-nine".