2161545412 has 48 divisors (see below), whose sum is σ = 4293889600. Its totient is φ = 943850880.

The previous prime is 2161545409. The next prime is 2161545433. The reversal of 2161545412 is 2145451612.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1411087 + ... + 1412617.

Almost surely, 2^2161545412 is an apocalyptic number.

It is an amenable number.

2161545412 is a deficient number, since it is larger than the sum of its proper divisors (2132344188).

2161545412 is a wasteful number, since it uses less digits than its factorization.

2161545412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2996 (or 2994 counting only the distinct ones).

The product of its digits is 9600, while the sum is 31.

The square root of 2161545412 is about 46492.4231676517. The cubic root of 2161545412 is about 1292.9690265645.

The spelling of 2161545412 in words is "two billion, one hundred sixty-one million, five hundred forty-five thousand, four hundred twelve".