2165456416 has 12 divisors (see below), whose sum is σ = 4263242382. Its totient is φ = 1082728192.

The previous prime is 2165456407. The next prime is 2165456437. The reversal of 2165456416 is 6146545612.

It can be written as a sum of positive squares in only one way, i.e., 1521312016 + 644144400 = 39004^2 + 25380^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33835225 + ... + 33835288.

Almost surely, 2^2165456416 is an apocalyptic number.

It is an amenable number.

2165456416 is a deficient number, since it is larger than the sum of its proper divisors (2097785966).

2165456416 is an equidigital number, since it uses as much as digits as its factorization.

2165456416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67670523 (or 67670515 counting only the distinct ones).

The product of its digits is 172800, while the sum is 40.

The square root of 2165456416 is about 46534.4648190994. The cubic root of 2165456416 is about 1293.7483702407.

The spelling of 2165456416 in words is "two billion, one hundred sixty-five million, four hundred fifty-six thousand, four hundred sixteen".