7513871121 has 20 divisors (see below), whose sum is σ = 11228970852. Its totient is φ = 5007218688.

The previous prime is 7513871111. The next prime is 7513871137. The reversal of 7513871121 is 1211783157.

It can be written as a sum of positive squares in 2 ways, for example, as 4269315600 + 3244555521 = 65340^2 + 56961^2 .

It is not a de Polignac number, because 7513871121 - 2¹¹ = 7513869073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7513871111) 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 19 ways as a sum of consecutive naturals, for example, 197761 + ... + 232673.

Almost surely, 2^7513871121 is an apocalyptic number.

It is an amenable number.

7513871121 is a deficient number, since it is larger than the sum of its proper divisors (3715099731).

7513871121 is a wasteful number, since it uses less digits than its factorization.

7513871121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37582 (or 37573 counting only the distinct ones).

The product of its digits is 11760, while the sum is 36.

The square root of 7513871121 is about 86682.5883381432. The cubic root of 7513871121 is about 1958.6398241232.

The spelling of 7513871121 in words is "seven billion, five hundred thirteen million, eight hundred seventy-one thousand, one hundred twenty-one".