2188118457 has 24 divisors (see below), whose sum is σ = 3613461696. Its totient is φ = 1249893216.

The previous prime is 2188118437. The next prime is 2188118473. The reversal of 2188118457 is 7548118812.

2188118457 is a `hidden beast` number, since 2 + 1 + 88 + 118 + 457 = 666.

It is not a de Polignac number, because 2188118457 - 2⁷ = 2188118329 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2188118407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 242338 + ... + 251204.

It is an arithmetic number, because the mean of its divisors is an integer number (150560904).

Almost surely, 2^2188118457 is an apocalyptic number.

It is an amenable number.

2188118457 is a deficient number, since it is larger than the sum of its proper divisors (1425343239).

2188118457 is a wasteful number, since it uses less digits than its factorization.

2188118457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12797 (or 12794 counting only the distinct ones).

The product of its digits is 143360, while the sum is 45.

The square root of 2188118457 is about 46777.3284508639. The cubic root of 2188118457 is about 1298.2458504812.

The spelling of 2188118457 in words is "two billion, one hundred eighty-eight million, one hundred eighteen thousand, four hundred fifty-seven".