2159945966 has 8 divisors (see below), whose sum is σ = 3327484440. Its totient is φ = 1050784488.

The previous prime is 2159945899. The next prime is 2159945971. The reversal of 2159945966 is 6695499512.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14594156 + ... + 14594303.

It is an arithmetic number, because the mean of its divisors is an integer number (415935555).

Almost surely, 2^2159945966 is an apocalyptic number.

2159945966 is a deficient number, since it is larger than the sum of its proper divisors (1167538474).

2159945966 is a wasteful number, since it uses less digits than its factorization.

2159945966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29188498.

The product of its digits is 5248800, while the sum is 56.

The square root of 2159945966 is about 46475.2188375698. The cubic root of 2159945966 is about 1292.6500349733.

The spelling of 2159945966 in words is "two billion, one hundred fifty-nine million, nine hundred forty-five thousand, nine hundred sixty-six".