7840742535218 has 16 divisors (see below), whose sum is σ = 11777647031640. Its totient is φ = 3914861677056.

The previous prime is 7840742535187. The next prime is 7840742535229. The reversal of 7840742535218 is 8125352470487.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 5656562992609 + 2184179542609 = 2378353^2 + 1477897^2 .

It is a super-2 number, since 2×7840742535218² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

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, 10294580 + ... + 11029952.

Almost surely, 2^{7840742535218} is an apocalyptic number.

7840742535218 is a deficient number, since it is larger than the sum of its proper divisors (3936904496422).

7840742535218 is a wasteful number, since it uses less digits than its factorization.

7840742535218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 742861.

The product of its (nonzero) digits is 15052800, while the sum is 56.

The spelling of 7840742535218 in words is "seven trillion, eight hundred forty billion, seven hundred forty-two million, five hundred thirty-five thousand, two hundred eighteen".