78794249747 has 2 divisors, whose sum is σ = 78794249748. Its totient is φ = 78794249746.

The previous prime is 78794249713. The next prime is 78794249777. The reversal of 78794249747 is 74794249787.

It is a strong prime.

It is an emirp because it is prime and its reverse (74794249787) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78794249747 - 2⁸ = 78794249491 is a prime.

It is not a weakly prime, because it can be changed into another prime (78794249777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39397124873 + 39397124874.

It is an arithmetic number, because the mean of its divisors is an integer number (39397124874).

Almost surely, 2^78794249747 is an apocalyptic number.

78794249747 is a deficient number, since it is larger than the sum of its proper divisors (1).

78794249747 is an equidigital number, since it uses as much as digits as its factorization.

78794249747 is an evil number, because the sum of its binary digits is even.

The product of its digits is 199148544, while the sum is 68.

The spelling of 78794249747 in words is "seventy-eight billion, seven hundred ninety-four million, two hundred forty-nine thousand, seven hundred forty-seven".