7798952158321 has 2 divisors, whose sum is σ = 7798952158322. Its totient is φ = 7798952158320.

The previous prime is 7798952158289. The next prime is 7798952158337. The reversal of 7798952158321 is 1238512598977.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6541773020721 + 1257179137600 = 2557689^2 + 1121240^2 .

It is a cyclic number.

It is not a de Polignac number, because 7798952158321 - 2⁵ = 7798952158289 is a prime.

It is not a weakly prime, because it can be changed into another prime (7798952158721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3899476079160 + 3899476079161.

It is an arithmetic number, because the mean of its divisors is an integer number (3899476079161).

Almost surely, 2^{7798952158321} is an apocalyptic number.

It is an amenable number.

7798952158321 is a deficient number, since it is larger than the sum of its proper divisors (1).

7798952158321 is an equidigital number, since it uses as much as digits as its factorization.

7798952158321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 76204800, while the sum is 67.

The spelling of 7798952158321 in words is "seven trillion, seven hundred ninety-eight billion, nine hundred fifty-two million, one hundred fifty-eight thousand, three hundred twenty-one".