2867218561 has 8 divisors (see below), whose sum is σ = 2877436520. Its totient is φ = 2857016448.

The previous prime is 2867218537. The next prime is 2867218567. The reversal of 2867218561 is 1658127682.

It can be written as a sum of positive squares in 4 ways, for example, as 36978561 + 2830240000 = 6081^2 + 53200^2 .

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 2867218561 - 2¹³ = 2867210369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2867218567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 445015 + ... + 451411.

It is an arithmetic number, because the mean of its divisors is an integer number (359679565).

Almost surely, 2^2867218561 is an apocalyptic number.

It is an amenable number.

2867218561 is a deficient number, since it is larger than the sum of its proper divisors (10217959).

2867218561 is a wasteful number, since it uses less digits than its factorization.

2867218561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7923.

The product of its digits is 322560, while the sum is 46.

The square root of 2867218561 is about 53546.4150153864. The cubic root of 2867218561 is about 1420.6494683296.

The spelling of 2867218561 in words is "two billion, eight hundred sixty-seven million, two hundred eighteen thousand, five hundred sixty-one".