7206538518 has 16 divisors (see below), whose sum is σ = 16014530160. Its totient is φ = 2402179488.

The previous prime is 7206538487. The next prime is 7206538543. The reversal of 7206538518 is 8158356027.

7206538518 is a `hidden beast` number, since 72 + 0 + 65 + 3 + 8 + 518 = 666.

It is a super-2 number, since 2×7206538518² (a number of 21 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 7 ways as a sum of consecutive naturals, for example, 66727155 + ... + 66727262.

It is an arithmetic number, because the mean of its divisors is an integer number (1000908135).

Almost surely, 2^7206538518 is an apocalyptic number.

7206538518 is an abundant number, since it is smaller than the sum of its proper divisors (8807991642).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7206538518 is a wasteful number, since it uses less digits than its factorization.

7206538518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133454428 (or 133454422 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 45.

The square root of 7206538518 is about 84891.3335859439. Note that the first 3 decimals coincide. The cubic root of 7206538518 is about 1931.5631173335.

The spelling of 7206538518 in words is "seven billion, two hundred six million, five hundred thirty-eight thousand, five hundred eighteen".