7975775798 has 16 divisors (see below), whose sum is σ = 12061178640. Its totient is φ = 3955437696.

The previous prime is 7975775789. The next prime is 7975775807. The reversal of 7975775798 is 8975775797.

It is an interprime number because it is at equal distance from previous prime (7975775789) and next prime (7975775807).

It is a super-2 number, since 2×7975775798² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 291890 + ... + 318042.

It is an arithmetic number, because the mean of its divisors is an integer number (753823665).

Almost surely, 2^7975775798 is an apocalyptic number.

7975775798 is a deficient number, since it is larger than the sum of its proper divisors (4085402842).

7975775798 is a wasteful number, since it uses less digits than its factorization.

7975775798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27391.

The product of its digits is 272273400, while the sum is 71.

The square root of 7975775798 is about 89307.1990267302. The cubic root of 7975775798 is about 1997.9792755239.

Subtracting 7975775798 from its reverse (8975775797), we obtain a palindrome (999999999).

The spelling of 7975775798 in words is "seven billion, nine hundred seventy-five million, seven hundred seventy-five thousand, seven hundred ninety-eight".