2190917648 has 20 divisors (see below), whose sum is σ = 4254719868. Its totient is φ = 1092925440.

The previous prime is 2190917633. The next prime is 2190917669. The reversal of 2190917648 is 8467190912.

It can be written as a sum of positive squares in 2 ways, for example, as 441336064 + 1749581584 = 21008^2 + 41828^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 151193 + ... + 165048.

Almost surely, 2^2190917648 is an apocalyptic number.

It is an amenable number.

2190917648 is a deficient number, since it is larger than the sum of its proper divisors (2063802220).

2190917648 is a wasteful number, since it uses less digits than its factorization.

2190917648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316682 (or 316676 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 47.

The square root of 2190917648 is about 46807.2392691558. The cubic root of 2190917648 is about 1298.7992162511.

The spelling of 2190917648 in words is "two billion, one hundred ninety million, nine hundred seventeen thousand, six hundred forty-eight".