78297319546739 has 2 divisors, whose sum is σ = 78297319546740. Its totient is φ = 78297319546738.

The previous prime is 78297319546727. The next prime is 78297319546753. The reversal of 78297319546739 is 93764591379287.

It is a weak prime.

It is an emirp because it is prime and its reverse (93764591379287) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78297319546739 - 2¹⁶ = 78297319481203 is a prime.

It is a super-2 number, since 2×78297319546739² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78297319546799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39148659773369 + 39148659773370.

It is an arithmetic number, because the mean of its divisors is an integer number (39148659773370).

Almost surely, 2^{78297319546739} is an apocalyptic number.

78297319546739 is a deficient number, since it is larger than the sum of its proper divisors (1).

78297319546739 is an equidigital number, since it uses as much as digits as its factorization.

78297319546739 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320812160, while the sum is 80.

The spelling of 78297319546739 in words is "seventy-eight trillion, two hundred ninety-seven billion, three hundred nineteen million, five hundred forty-six thousand, seven hundred thirty-nine".