2118866961 has 8 divisors (see below), whose sum is σ = 2991341664. Its totient is φ = 1329485120.

The previous prime is 2118866917. The next prime is 2118866963. The reversal of 2118866961 is 1696688112.

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

It is a cyclic number.

It is not a de Polignac number, because 2118866961 - 2¹³ = 2118858769 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2118866961.

It is not an unprimeable number, because it can be changed into a prime (2118866963) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20773155 + ... + 20773256.

It is an arithmetic number, because the mean of its divisors is an integer number (373917708).

Almost surely, 2^2118866961 is an apocalyptic number.

It is an amenable number.

2118866961 is a deficient number, since it is larger than the sum of its proper divisors (872474703).

2118866961 is a wasteful number, since it uses less digits than its factorization.

2118866961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41546431.

The product of its digits is 248832, while the sum is 48.

The square root of 2118866961 is about 46031.1520711789. The cubic root of 2118866961 is about 1284.4027587894.

The spelling of 2118866961 in words is "two billion, one hundred eighteen million, eight hundred sixty-six thousand, nine hundred sixty-one".