2118009601 has 4 divisors (see below), whose sum is σ = 2119751172. Its totient is φ = 2116268032.

The previous prime is 2118009589. The next prime is 2118009631. The reversal of 2118009601 is 1069008112.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1494209025 + 623800576 = 38655^2 + 24976^2 .

It is a cyclic number.

It is not a de Polignac number, because 2118009601 - 2⁷ = 2118009473 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2118009601.

It is not an unprimeable number, because it can be changed into a prime (2118009631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 868960 + ... + 871393.

It is an arithmetic number, because the mean of its divisors is an integer number (529937793).

Almost surely, 2^2118009601 is an apocalyptic number.

It is an amenable number.

2118009601 is a deficient number, since it is larger than the sum of its proper divisors (1741571).

2118009601 is a wasteful number, since it uses less digits than its factorization.

2118009601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1741570.

The product of its (nonzero) digits is 864, while the sum is 28.

The square root of 2118009601 is about 46021.8383053089. The cubic root of 2118009601 is about 1284.2294988775.

The spelling of 2118009601 in words is "two billion, one hundred eighteen million, nine thousand, six hundred one".