2620866842009 has 8 divisors (see below), whose sum is σ = 2826322569672. Its totient is φ = 2415961198080.

The previous prime is 2620866841997. The next prime is 2620866842023. The reversal of 2620866842009 is 9002486680262.

2620866842009 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1494254425609 + 1126612416400 = 1222397^2 + 1061420^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2620866842009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2620866842029) 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, 137511032 + ... + 137530089.

It is an arithmetic number, because the mean of its divisors is an integer number (353290321209).

Almost surely, 2^{2620866842009} is an apocalyptic number.

It is an amenable number.

2620866842009 is a deficient number, since it is larger than the sum of its proper divisors (205455727663).

2620866842009 is a wasteful number, since it uses less digits than its factorization.

2620866842009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275041867.

The product of its (nonzero) digits is 3981312, while the sum is 53.

The spelling of 2620866842009 in words is "two trillion, six hundred twenty billion, eight hundred sixty-six million, eight hundred forty-two thousand, nine".