2177997648 has 40 divisors (see below), whose sum is σ = 5684511168. Its totient is φ = 718513152.

The previous prime is 2177997631. The next prime is 2177997649. The reversal of 2177997648 is 8467997712.

It is a junction number, because it is equal to n+sod(n) for n = 2177997591 and 2177997600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2177997649) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 229236 + ... + 238547.

Almost surely, 2^2177997648 is an apocalyptic number.

It is an amenable number.

2177997648 is an abundant number, since it is smaller than the sum of its proper divisors (3506513520).

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

2177997648 is a wasteful number, since it uses less digits than its factorization.

2177997648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 467891 (or 467885 counting only the distinct ones).

The product of its digits is 10668672, while the sum is 60.

The square root of 2177997648 is about 46669.0223595909. The cubic root of 2177997648 is about 1296.2411435903.

The spelling of 2177997648 in words is "two billion, one hundred seventy-seven million, nine hundred ninety-seven thousand, six hundred forty-eight".