2161611416 has 16 divisors (see below), whose sum is σ = 4062260400. Its totient is φ = 1078341984.

The previous prime is 2161611343. The next prime is 2161611467. The reversal of 2161611416 is 6141161612.

It is a happy number.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 304235 + ... + 311258.

It is an arithmetic number, because the mean of its divisors is an integer number (253891275).

Almost surely, 2^2161611416 is an apocalyptic number.

It is an amenable number.

2161611416 is a deficient number, since it is larger than the sum of its proper divisors (1900648984).

2161611416 is a wasteful number, since it uses less digits than its factorization.

2161611416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615938 (or 615934 counting only the distinct ones).

The product of its digits is 1728, while the sum is 29.

The square root of 2161611416 is about 46493.1329983257. The cubic root of 2161611416 is about 1292.9821869418.

The spelling of 2161611416 in words is "two billion, one hundred sixty-one million, six hundred eleven thousand, four hundred sixteen".