2161349352 has 128 divisors (see below), whose sum is σ = 6233760000. Its totient is φ = 693036288.

The previous prime is 2161349347. The next prime is 2161349363. The reversal of 2161349352 is 2539431612.

2161349352 is a `hidden beast` number, since 2 + 1 + 613 + 4 + 9 + 35 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 2436253 + ... + 2437139.

It is an arithmetic number, because the mean of its divisors is an integer number (48701250).

Almost surely, 2^2161349352 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2161349352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3116880000).

2161349352 is an abundant number, since it is smaller than the sum of its proper divisors (4072410648).

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

2161349352 is a wasteful number, since it uses less digits than its factorization.

2161349352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1320 (or 1310 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The square root of 2161349352 is about 46490.3146042270. The cubic root of 2161349352 is about 1292.9299330575.

The spelling of 2161349352 in words is "two billion, one hundred sixty-one million, three hundred forty-nine thousand, three hundred fifty-two".