78842058739 has 2 divisors, whose sum is σ = 78842058740. Its totient is φ = 78842058738.

The previous prime is 78842058719. The next prime is 78842058751. The reversal of 78842058739 is 93785024887.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78842058739 - 2⁷ = 78842058611 is a prime.

It is not a weakly prime, because it can be changed into another prime (78842058719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39421029369 + 39421029370.

It is an arithmetic number, because the mean of its divisors is an integer number (39421029370).

Almost surely, 2^78842058739 is an apocalyptic number.

78842058739 is a deficient number, since it is larger than the sum of its proper divisors (1).

78842058739 is an equidigital number, since it uses as much as digits as its factorization.

78842058739 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27095040, while the sum is 61.

The spelling of 78842058739 in words is "seventy-eight billion, eight hundred forty-two million, fifty-eight thousand, seven hundred thirty-nine".