2161736748 has 36 divisors (see below), whose sum is σ = 5666777480. Its totient is φ = 720578592.

The previous prime is 2161736741. The next prime is 2161736749. The reversal of 2161736748 is 8476371612.

2161736748 is a `hidden beast` number, since 21 + 617 + 3 + 6 + 7 + 4 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (2161736741) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1111033 + ... + 1112976.

Almost surely, 2^2161736748 is an apocalyptic number.

It is an amenable number.

2161736748 is an abundant number, since it is smaller than the sum of its proper divisors (3505040732).

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

2161736748 is a wasteful number, since it uses less digits than its factorization.

2161736748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2224028 (or 2224014 counting only the distinct ones).

The product of its digits is 338688, while the sum is 45.

The square root of 2161736748 is about 46494.4808337506. The cubic root of 2161736748 is about 1293.0071758475.

The spelling of 2161736748 in words is "two billion, one hundred sixty-one million, seven hundred thirty-six thousand, seven hundred forty-eight".