2180828645 has 16 divisors (see below), whose sum is σ = 2792475840. Its totient is φ = 1630191744.

The previous prime is 2180828621. The next prime is 2180828647. The reversal of 2180828645 is 5468280812.

It is a cyclic number.

It is not a de Polignac number, because 2180828645 - 2⁸ = 2180828389 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2180828596 and 2180828605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2180828647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 150299 + ... + 164168.

It is an arithmetic number, because the mean of its divisors is an integer number (174529740).

Almost surely, 2^2180828645 is an apocalyptic number.

It is an amenable number.

2180828645 is a deficient number, since it is larger than the sum of its proper divisors (611647195).

2180828645 is a wasteful number, since it uses less digits than its factorization.

2180828645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314564.

The product of its (nonzero) digits is 245760, while the sum is 44.

The square root of 2180828645 is about 46699.3430895982. The cubic root of 2180828645 is about 1296.8025255827.

The spelling of 2180828645 in words is "two billion, one hundred eighty million, eight hundred twenty-eight thousand, six hundred forty-five".