7131145915815 has 16 divisors (see below), whose sum is σ = 11496931433856. Its totient is φ = 3774245165600.

The previous prime is 7131145915757. The next prime is 7131145915909. The reversal of 7131145915815 is 5185195411317.

It is not a de Polignac number, because 7131145915815 - 2¹⁰ = 7131145914791 is a prime.

It is a super-2 number, since 2×7131145915815² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1814538981 + ... + 1814542910.

It is an arithmetic number, because the mean of its divisors is an integer number (718558214616).

Almost surely, 2^{7131145915815} is an apocalyptic number.

7131145915815 is a deficient number, since it is larger than the sum of its proper divisors (4365785518041).

7131145915815 is a wasteful number, since it uses less digits than its factorization.

7131145915815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3629082030.

The product of its digits is 756000, while the sum is 51.

The spelling of 7131145915815 in words is "seven trillion, one hundred thirty-one billion, one hundred forty-five million, nine hundred fifteen thousand, eight hundred fifteen".