2181634245 has 96 divisors (see below), whose sum is σ = 4594636800. Its totient is φ = 935390592.

The previous prime is 2181634241. The next prime is 2181634261. The reversal of 2181634245 is 5424361812.

It is a happy number.

2181634245 is a `hidden beast` number, since 2 + 18 + 1 + 634 + 2 + 4 + 5 = 666.

It is not a de Polignac number, because 2181634245 - 2² = 2181634241 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2181634241) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 614686 + ... + 618224.

It is an arithmetic number, because the mean of its divisors is an integer number (47860800).

Almost surely, 2^2181634245 is an apocalyptic number.

It is an amenable number.

2181634245 is an abundant number, since it is smaller than the sum of its proper divisors (2413002555).

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

2181634245 is a wasteful number, since it uses less digits than its factorization.

2181634245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3679 (or 3676 counting only the distinct ones).

The product of its digits is 46080, while the sum is 36.

The square root of 2181634245 is about 46707.9676821846. The cubic root of 2181634245 is about 1296.9621859187.

The spelling of 2181634245 in words is "two billion, one hundred eighty-one million, six hundred thirty-four thousand, two hundred forty-five".