7975025813 has 4 divisors (see below), whose sum is σ = 7979069868. Its totient is φ = 7970981760.

The previous prime is 7975025803. The next prime is 7975025827. The reversal of 7975025813 is 3185205797.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3185205797 = 9629 ⋅330793.

It can be written as a sum of positive squares in 2 ways, for example, as 1715367889 + 6259657924 = 41417^2 + 79118^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7975025813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7975025803) 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 in 3 ways as a sum of consecutive naturals, for example, 2019068 + ... + 2023013.

It is an arithmetic number, because the mean of its divisors is an integer number (1994767467).

Almost surely, 2^7975025813 is an apocalyptic number.

It is an amenable number.

7975025813 is a deficient number, since it is larger than the sum of its proper divisors (4044055).

7975025813 is a wasteful number, since it uses less digits than its factorization.

7975025813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4044054.

The product of its (nonzero) digits is 529200, while the sum is 47.

The square root of 7975025813 is about 89303.0000223957. Note that the first 4 decimals coincide. The cubic root of 7975025813 is about 1997.9166483264.

The spelling of 7975025813 in words is "seven billion, nine hundred seventy-five million, twenty-five thousand, eight hundred thirteen".