7137518813 has 2 divisors, whose sum is σ = 7137518814. Its totient is φ = 7137518812.

The previous prime is 7137518809. The next prime is 7137518821. The reversal of 7137518813 is 3188157317.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5955671929 + 1181846884 = 77173^2 + 34378^2 .

It is a cyclic number.

It is not a de Polignac number, because 7137518813 - 2² = 7137518809 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7137548813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3568759406 + 3568759407.

It is an arithmetic number, because the mean of its divisors is an integer number (3568759407).

Almost surely, 2^7137518813 is an apocalyptic number.

It is an amenable number.

7137518813 is a deficient number, since it is larger than the sum of its proper divisors (1).

7137518813 is an equidigital number, since it uses as much as digits as its factorization.

7137518813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 141120, while the sum is 44.

The square root of 7137518813 is about 84483.8375844753. The cubic root of 7137518813 is about 1925.3768925727.

The spelling of 7137518813 in words is "seven billion, one hundred thirty-seven million, five hundred eighteen thousand, eight hundred thirteen".