78314811847 has 2 divisors, whose sum is σ = 78314811848. Its totient is φ = 78314811846.

The previous prime is 78314811833. The next prime is 78314811851. The reversal of 78314811847 is 74811841387.

It is a strong prime.

It is an emirp because it is prime and its reverse (74811841387) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78314811847 - 2¹¹ = 78314809799 is a prime.

It is a super-2 number, since 2×78314811847² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78314811794 and 78314811803.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78314812847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39157405923 + 39157405924.

It is an arithmetic number, because the mean of its divisors is an integer number (39157405924).

Almost surely, 2^78314811847 is an apocalyptic number.

78314811847 is a deficient number, since it is larger than the sum of its proper divisors (1).

78314811847 is an equidigital number, since it uses as much as digits as its factorization.

78314811847 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1204224, while the sum is 52.

The spelling of 78314811847 in words is "seventy-eight billion, three hundred fourteen million, eight hundred eleven thousand, eight hundred forty-seven".