2105136661 has 8 divisors (see below), whose sum is σ = 2116453664. Its totient is φ = 2093832720.

The previous prime is 2105136659. The next prime is 2105136667. The reversal of 2105136661 is 1666315012.

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 2105136661 - 2¹ = 2105136659 is a prime.

It is a super-2 number, since 2×2105136661² = 8863200722972457842, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2105136667) 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 7 ways as a sum of consecutive naturals, for example, 645511 + ... + 648763.

It is an arithmetic number, because the mean of its divisors is an integer number (264556708).

Almost surely, 2^2105136661 is an apocalyptic number.

It is an amenable number.

2105136661 is a deficient number, since it is larger than the sum of its proper divisors (11317003).

2105136661 is a wasteful number, since it uses less digits than its factorization.

2105136661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6531.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 2105136661 is about 45881.7682854530. The cubic root of 2105136661 is about 1281.6224261121.

The spelling of 2105136661 in words is "two billion, one hundred five million, one hundred thirty-six thousand, six hundred sixty-one".