2100561654 has 8 divisors (see below), whose sum is σ = 4201123320. Its totient is φ = 700187216.

The previous prime is 2100561649. The next prime is 2100561677. The reversal of 2100561654 is 4561650012.

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

2100561654 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 175046799 + ... + 175046810.

It is an arithmetic number, because the mean of its divisors is an integer number (525140415).

Almost surely, 2^2100561654 is an apocalyptic number.

2100561654 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2100561654 is a wasteful number, since it uses less digits than its factorization.

2100561654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350093614.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 2100561654 is about 45831.8846874095. The cubic root of 2100561654 is about 1280.6933202729.

The spelling of 2100561654 in words is "two billion, one hundred million, five hundred sixty-one thousand, six hundred fifty-four".