2170651640 has 16 divisors (see below), whose sum is σ = 4883966280. Its totient is φ = 868260640.

The previous prime is 2170651631. The next prime is 2170651663. The reversal of 2170651640 is 461560712.

It is a junction number, because it is equal to n+sod(n) for n = 2170651597 and 2170651606.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27133106 + ... + 27133185.

Almost surely, 2^2170651640 is an apocalyptic number.

2170651640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2170651640 is an abundant number, since it is smaller than the sum of its proper divisors (2713314640).

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

2170651640 is a wasteful number, since it uses less digits than its factorization.

2170651640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54266302 (or 54266298 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 2170651640 is about 46590.2526286347. The cubic root of 2170651640 is about 1294.7821699472.

The spelling of 2170651640 in words is "two billion, one hundred seventy million, six hundred fifty-one thousand, six hundred forty".