7539378313 has 4 divisors (see below), whose sum is σ = 7681630788. Its totient is φ = 7397125840.

The previous prime is 7539378299. The next prime is 7539378323. The reversal of 7539378313 is 3138739357.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5880282489 + 1659095824 = 76683^2 + 40732^2 .

It is a cyclic number.

It is not a de Polignac number, because 7539378313 - 2²⁹ = 7002507401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7539378323) 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, 71126158 + ... + 71126263.

It is an arithmetic number, because the mean of its divisors is an integer number (1920407697).

Almost surely, 2^7539378313 is an apocalyptic number.

It is an amenable number.

7539378313 is a deficient number, since it is larger than the sum of its proper divisors (142252475).

7539378313 is a wasteful number, since it uses less digits than its factorization.

7539378313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142252474.

The product of its digits is 1428840, while the sum is 49.

The square root of 7539378313 is about 86829.5935323896. The cubic root of 7539378313 is about 1960.8536397696.

The spelling of 7539378313 in words is "seven billion, five hundred thirty-nine million, three hundred seventy-eight thousand, three hundred thirteen".