2117650640 has 60 divisors (see below), whose sum is σ = 5727391236. Its totient is φ = 726050304.

The previous prime is 2117650621. The next prime is 2117650651. The reversal of 2117650640 is 460567112.

It can be written as a sum of positive squares in 2 ways, for example, as 946915984 + 1170734656 = 30772^2 + 34216^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2117650597 and 2117650606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 266189 + ... + 274028.

Almost surely, 2^2117650640 is an apocalyptic number.

2117650640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2117650640 is an abundant number, since it is smaller than the sum of its proper divisors (3609740596).

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

2117650640 is a wasteful number, since it uses less digits than its factorization.

2117650640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540244 (or 540231 counting only the distinct ones).

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

The square root of 2117650640 is about 46017.9382415162. The cubic root of 2117650640 is about 1284.1569442252.

The spelling of 2117650640 in words is "two billion, one hundred seventeen million, six hundred fifty thousand, six hundred forty".