7957275649 has 4 divisors (see below), whose sum is σ = 8003271636. Its totient is φ = 7911279664.

The previous prime is 7957275643. The next prime is 7957275659. The reversal of 7957275649 is 9465727597.

7957275649 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9465727597 = 71 ⋅133320107.

It can be written as a sum of positive squares in 2 ways, for example, as 7767249424 + 190026225 = 88132^2 + 13785^2 .

It is a cyclic number.

It is not a de Polignac number, because 7957275649 - 2²⁵ = 7923721217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7957275643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22997734 + ... + 22998079.

It is an arithmetic number, because the mean of its divisors is an integer number (2000817909).

Almost surely, 2^7957275649 is an apocalyptic number.

It is an amenable number.

7957275649 is a deficient number, since it is larger than the sum of its proper divisors (45995987).

7957275649 is a wasteful number, since it uses less digits than its factorization.

7957275649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45995986.

The product of its digits is 33339600, while the sum is 61.

The square root of 7957275649 is about 89203.5629837732. The cubic root of 7957275649 is about 1996.4332804537.

The spelling of 7957275649 in words is "seven billion, nine hundred fifty-seven million, two hundred seventy-five thousand, six hundred forty-nine".