2189612736 has 196 divisors, whose sum is σ = 6616287504. Its totient is φ = 718502400.

The previous prime is 2189612701. The next prime is 2189612809. The reversal of 2189612736 is 6372169812.

2189612736 is a `hidden beast` number, since 21 + 8 + 9 + 612 + 7 + 3 + 6 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 2189612691 and 2189612700.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 3312246 + ... + 3312906.

Almost surely, 2^2189612736 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2189612736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3308143752).

2189612736 is an abundant number, since it is smaller than the sum of its proper divisors (4426674768).

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

2189612736 is an frugal number, since it uses more digits than its factorization.

2189612736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 762 (or 737 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 2189612736 is about 46793.2979816554. The cubic root of 2189612736 is about 1298.5413098172.

The spelling of 2189612736 in words is "two billion, one hundred eighty-nine million, six hundred twelve thousand, seven hundred thirty-six".