78200930321 has 2 divisors, whose sum is σ = 78200930322. Its totient is φ = 78200930320.

The previous prime is 78200930279. The next prime is 78200930369. The reversal of 78200930321 is 12303900287.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67462789696 + 10738140625 = 259736^2 + 103625^2 .

It is a cyclic number.

It is not a de Polignac number, because 78200930321 - 2¹⁰ = 78200929297 is a prime.

It is a super-2 number, since 2×78200930321² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78200935321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39100465160 + 39100465161.

It is an arithmetic number, because the mean of its divisors is an integer number (39100465161).

Almost surely, 2^78200930321 is an apocalyptic number.

It is an amenable number.

78200930321 is a deficient number, since it is larger than the sum of its proper divisors (1).

78200930321 is an equidigital number, since it uses as much as digits as its factorization.

78200930321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 35.

The spelling of 78200930321 in words is "seventy-eight billion, two hundred million, nine hundred thirty thousand, three hundred twenty-one".