2160911961 has 24 divisors (see below), whose sum is σ = 3374856576. Its totient is φ = 1324476000.

The previous prime is 2160911959. The next prime is 2160912001. The reversal of 2160911961 is 1691190612.

It is not a de Polignac number, because 2160911961 - 2¹ = 2160911959 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2160911461) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7425 + ... + 66158.

It is an arithmetic number, because the mean of its divisors is an integer number (140619024).

Almost surely, 2^2160911961 is an apocalyptic number.

It is an amenable number.

2160911961 is a deficient number, since it is larger than the sum of its proper divisors (1213944615).

2160911961 is a wasteful number, since it uses less digits than its factorization.

2160911961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73853 (or 73850 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 36.

The square root of 2160911961 is about 46485.6102573689. The cubic root of 2160911961 is about 1292.8427106829.

The spelling of 2160911961 in words is "two billion, one hundred sixty million, nine hundred eleven thousand, nine hundred sixty-one".