7105987818 has 16 divisors (see below), whose sum is σ = 15791084160. Its totient is φ = 2368662588.

The previous prime is 7105987817. The next prime is 7105987871. The reversal of 7105987818 is 8187895017.

It is a super-2 number, since 2×7105987818² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 131592367 = 7105987818 / (7 + 1 + 0 + 5 + 9 + 8 + 7 + 8 + 1 + 8).

It is not an unprimeable number, because it can be changed into a prime (7105987817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65796130 + ... + 65796237.

It is an arithmetic number, because the mean of its divisors is an integer number (986942760).

Almost surely, 2^7105987818 is an apocalyptic number.

7105987818 is an abundant number, since it is smaller than the sum of its proper divisors (8685096342).

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

7105987818 is a wasteful number, since it uses less digits than its factorization.

7105987818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131592378 (or 131592372 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 54.

The square root of 7105987818 is about 84297.0214064530. The cubic root of 7105987818 is about 1922.5374994193.

The spelling of 7105987818 in words is "seven billion, one hundred five million, nine hundred eighty-seven thousand, eight hundred eighteen".