2187718187068 has 6 divisors (see below), whose sum is σ = 3828506827376. Its totient is φ = 1093859093532.

The previous prime is 2187718187059. The next prime is 2187718187069. The reversal of 2187718187068 is 8607818177812.

It is a happy number.

It is a super-2 number, since 2×2187718187068² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2187718187069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 273464773380 + ... + 273464773387.

Almost surely, 2^{2187718187068} is an apocalyptic number.

It is an amenable number.

2187718187068 is a deficient number, since it is larger than the sum of its proper divisors (1640788640308).

2187718187068 is a wasteful number, since it uses less digits than its factorization.

2187718187068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 546929546771 (or 546929546769 counting only the distinct ones).

The product of its (nonzero) digits is 16859136, while the sum is 64.

The spelling of 2187718187068 in words is "two trillion, one hundred eighty-seven billion, seven hundred eighteen million, one hundred eighty-seven thousand, sixty-eight".