7881320351 has 2 divisors, whose sum is σ = 7881320352. Its totient is φ = 7881320350.

The previous prime is 7881320347. The next prime is 7881320393. The reversal of 7881320351 is 1530231887.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (1530231887) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7881320351 - 2² = 7881320347 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7881320341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3940660175 + 3940660176.

It is an arithmetic number, because the mean of its divisors is an integer number (3940660176).

Almost surely, 2^7881320351 is an apocalyptic number.

7881320351 is a deficient number, since it is larger than the sum of its proper divisors (1).

7881320351 is an equidigital number, since it uses as much as digits as its factorization.

7881320351 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 7881320351 is about 88776.8007477179. The cubic root of 7881320351 is about 1990.0607163953.

The spelling of 7881320351 in words is "seven billion, eight hundred eighty-one million, three hundred twenty thousand, three hundred fifty-one".