2146635664 has 20 divisors (see below), whose sum is σ = 4216082956. Its totient is φ = 1058614272.

The previous prime is 2146635619. The next prime is 2146635677. The reversal of 2146635664 is 4665366412.

It can be written as a sum of positive squares in 2 ways, for example, as 1306099600 + 840536064 = 36140^2 + 28992^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2146635664.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 917769 + ... + 920104.

Almost surely, 2^2146635664 is an apocalyptic number.

It is an amenable number.

2146635664 is a deficient number, since it is larger than the sum of its proper divisors (2069447292).

2146635664 is a wasteful number, since it uses less digits than its factorization.

2146635664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1837954 (or 1837948 counting only the distinct ones).

The product of its digits is 622080, while the sum is 43.

The square root of 2146635664 is about 46331.7997060334. The cubic root of 2146635664 is about 1289.9893162587.

The spelling of 2146635664 in words is "two billion, one hundred forty-six million, six hundred thirty-five thousand, six hundred sixty-four".