2161355364 has 36 divisors (see below), whose sum is σ = 6243916224. Its totient is φ = 617530032.

The previous prime is 2161355353. The next prime is 2161355377. The reversal of 2161355364 is 4635531612.

2161355364 is a `hidden beast` number, since 2 + 1 + 613 + 5 + 5 + 36 + 4 = 666.

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

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 11 ways as a sum of consecutive naturals, for example, 4288152 + ... + 4288655.

Almost surely, 2^2161355364 is an apocalyptic number.

It is an amenable number.

2161355364 is an abundant number, since it is smaller than the sum of its proper divisors (4082560860).

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

2161355364 is a wasteful number, since it uses less digits than its factorization.

2161355364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8576824 (or 8576819 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The square root of 2161355364 is about 46490.3792628109. The cubic root of 2161355364 is about 1292.9311318592.

Adding to 2161355364 its reverse (4635531612), we get a palindrome (6796886976).

The spelling of 2161355364 in words is "two billion, one hundred sixty-one million, three hundred fifty-five thousand, three hundred sixty-four".