7953938845 has 4 divisors (see below), whose sum is σ = 9544726620. Its totient is φ = 6363151072.

The previous prime is 7953938843. The next prime is 7953938879. The reversal of 7953938845 is 5488393597.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5488393597 = 157 ⋅34957921.

It can be written as a sum of positive squares in 2 ways, for example, as 1226330361 + 6727608484 = 35019^2 + 82022^2 .

It is a cyclic number.

It is not a de Polignac number, because 7953938845 - 2¹ = 7953938843 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7953938843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 795393880 + ... + 795393889.

It is an arithmetic number, because the mean of its divisors is an integer number (2386181655).

Almost surely, 2^7953938845 is an apocalyptic number.

It is an amenable number.

7953938845 is a deficient number, since it is larger than the sum of its proper divisors (1590787775).

7953938845 is a wasteful number, since it uses less digits than its factorization.

7953938845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1590787774.

The product of its digits is 32659200, while the sum is 61.

The square root of 7953938845 is about 89184.8577113851. The cubic root of 7953938845 is about 1996.1541799910.

The spelling of 7953938845 in words is "seven billion, nine hundred fifty-three million, nine hundred thirty-eight thousand, eight hundred forty-five".