2188668550 has 12 divisors (see below), whose sum is σ = 4070923596. Its totient is φ = 875467400.

The previous prime is 2188668497. The next prime is 2188668617. The reversal of 2188668550 is 558668812.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 2188668494 and 2188668503.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21886636 + ... + 21886735.

It is an arithmetic number, because the mean of its divisors is an integer number (339243633).

Almost surely, 2^2188668550 is an apocalyptic number.

2188668550 is a deficient number, since it is larger than the sum of its proper divisors (1882255046).

2188668550 is a wasteful number, since it uses less digits than its factorization.

2188668550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43773383 (or 43773378 counting only the distinct ones).

The product of its (nonzero) digits is 921600, while the sum is 49.

The square root of 2188668550 is about 46783.2079917570. The cubic root of 2188668550 is about 1298.3546343718.

The spelling of 2188668550 in words is "two billion, one hundred eighty-eight million, six hundred sixty-eight thousand, five hundred fifty".