2101656634 has 32 divisors (see below), whose sum is σ = 3946102272. Its totient is φ = 815550000.

The previous prime is 2101656631. The next prime is 2101656643. The reversal of 2101656634 is 4366561012.

It is a self number, because there is not a number n which added to its sum of digits gives 2101656634.

It is not an unprimeable number, because it can be changed into a prime (2101656631) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 11469 + ... + 65839.

It is an arithmetic number, because the mean of its divisors is an integer number (123315696).

Almost surely, 2^2101656634 is an apocalyptic number.

2101656634 is a deficient number, since it is larger than the sum of its proper divisors (1844445638).

2101656634 is a wasteful number, since it uses less digits than its factorization.

2101656634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54642.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 2101656634 is about 45843.8287449903. The cubic root of 2101656634 is about 1280.9158147298.

The spelling of 2101656634 in words is "two billion, one hundred one million, six hundred fifty-six thousand, six hundred thirty-four".