7957275643 has 2 divisors, whose sum is σ = 7957275644. Its totient is φ = 7957275642.

The previous prime is 7957275589. The next prime is 7957275659. The reversal of 7957275643 is 3465727597.

It is a strong prime.

It is an emirp because it is prime and its reverse (3465727597) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7957275643 is a prime.

It is not a weakly prime, because it can be changed into another prime (7957275743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3978637821 + 3978637822.

It is an arithmetic number, because the mean of its divisors is an integer number (3978637822).

Almost surely, 2^7957275643 is an apocalyptic number.

7957275643 is a deficient number, since it is larger than the sum of its proper divisors (1).

7957275643 is an equidigital number, since it uses as much as digits as its factorization.

7957275643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11113200, while the sum is 55.

The square root of 7957275643 is about 89203.5629501423. The cubic root of 7957275643 is about 1996.4332799519.

The spelling of 7957275643 in words is "seven billion, nine hundred fifty-seven million, two hundred seventy-five thousand, six hundred forty-three".