2106450661 has 12 divisors (see below), whose sum is σ = 2457442368. Its totient is φ = 1800311352.

The previous prime is 2106450629. The next prime is 2106450691. The reversal of 2106450661 is 1660546012.

It is not a de Polignac number, because 2106450661 - 2⁵ = 2106450629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2106450601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44941 + ... + 78946.

It is an arithmetic number, because the mean of its divisors is an integer number (204786864).

Almost surely, 2^2106450661 is an apocalyptic number.

It is an amenable number.

2106450661 is a deficient number, since it is larger than the sum of its proper divisors (350991707).

2106450661 is a wasteful number, since it uses less digits than its factorization.

2106450661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124248 (or 124241 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 2106450661 is about 45896.0854648847. The cubic root of 2106450661 is about 1281.8890282180.

Adding to 2106450661 its reverse (1660546012), we get a palindrome (3766996673).

The spelling of 2106450661 in words is "two billion, one hundred six million, four hundred fifty thousand, six hundred sixty-one".