7896557957 has 2 divisors, whose sum is σ = 7896557958. Its totient is φ = 7896557956.

The previous prime is 7896557951. The next prime is 7896557959. The reversal of 7896557957 is 7597556987.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7774654276 + 121903681 = 88174^2 + 11041^2 .

It is an emirp because it is prime and its reverse (7597556987) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7896557957 - 2⁴ = 7896557941 is a prime.

Together with 7896557959, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7896557951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3948278978 + 3948278979.

It is an arithmetic number, because the mean of its divisors is an integer number (3948278979).

Almost surely, 2^7896557957 is an apocalyptic number.

It is an amenable number.

7896557957 is a deficient number, since it is larger than the sum of its proper divisors (1).

7896557957 is an equidigital number, since it uses as much as digits as its factorization.

7896557957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 166698000, while the sum is 68.

The square root of 7896557957 is about 88862.5790589042. The cubic root of 7896557957 is about 1991.3424068673.

The spelling of 7896557957 in words is "seven billion, eight hundred ninety-six million, five hundred fifty-seven thousand, nine hundred fifty-seven".