78300490813 has 2 divisors, whose sum is σ = 78300490814. Its totient is φ = 78300490812.

The previous prime is 78300490811. The next prime is 78300490861. The reversal of 78300490813 is 31809400387.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78300351684 + 139129 = 279822^2 + 373^2 .

It is an emirp because it is prime and its reverse (31809400387) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78300490813 - 2¹ = 78300490811 is a prime.

It is a super-2 number, since 2×78300490813² (a number of 23 digits) contains 22 as substring.

Together with 78300490811, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 78300490813.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78300490811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39150245406 + 39150245407.

It is an arithmetic number, because the mean of its divisors is an integer number (39150245407).

Almost surely, 2^78300490813 is an apocalyptic number.

It is an amenable number.

78300490813 is a deficient number, since it is larger than the sum of its proper divisors (1).

78300490813 is an equidigital number, since it uses as much as digits as its factorization.

78300490813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 43.

The spelling of 78300490813 in words is "seventy-eight billion, three hundred million, four hundred ninety thousand, eight hundred thirteen".