2187616845 has 8 divisors (see below), whose sum is σ = 3500186976. Its totient is φ = 1166728976.

The previous prime is 2187616829. The next prime is 2187616853. The reversal of 2187616845 is 5486167812.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2187616845 - 2⁴ = 2187616829 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2187616794 and 2187616803.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72920547 + ... + 72920576.

It is an arithmetic number, because the mean of its divisors is an integer number (437523372).

Almost surely, 2^2187616845 is an apocalyptic number.

It is an amenable number.

2187616845 is a deficient number, since it is larger than the sum of its proper divisors (1312570131).

2187616845 is a wasteful number, since it uses less digits than its factorization.

2187616845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145841131.

The product of its digits is 645120, while the sum is 48.

The square root of 2187616845 is about 46771.9664435867. The cubic root of 2187616845 is about 1298.1466380788.

The spelling of 2187616845 in words is "two billion, one hundred eighty-seven million, six hundred sixteen thousand, eight hundred forty-five".