7858138388819 has 2 divisors, whose sum is σ = 7858138388820. Its totient is φ = 7858138388818.

The previous prime is 7858138388687. The next prime is 7858138388839. The reversal of 7858138388819 is 9188838318587.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 7858138388819 - 2¹⁶ = 7858138323283 is a prime.

It is a super-2 number, since 2×7858138388819² (a number of 27 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 7858138388819.

It is not a weakly prime, because it can be changed into another prime (7858138388839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3929069194409 + 3929069194410.

It is an arithmetic number, because the mean of its divisors is an integer number (3929069194410).

Almost surely, 2^{7858138388819} is an apocalyptic number.

7858138388819 is a deficient number, since it is larger than the sum of its proper divisors (1).

7858138388819 is an equidigital number, since it uses as much as digits as its factorization.

7858138388819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 743178240, while the sum is 77.

The spelling of 7858138388819 in words is "seven trillion, eight hundred fifty-eight billion, one hundred thirty-eight million, three hundred eighty-eight thousand, eight hundred nineteen".