2206867715809 has 27 divisors (see below), whose sum is σ = 2388578043891. Its totient is φ = 2038654092960.

The previous prime is 2206867715807. The next prime is 2206867715821. The reversal of 2206867715809 is 9085177686022.

The square root of 2206867715809 is 1485553.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 106339253409 + 2100528462400 = 326097^2 + 1449320^2 .

It is not a de Polignac number, because 2206867715809 - 2¹ = 2206867715807 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2206867715807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1157244834 + ... + 1157246740.

Almost surely, 2^{2206867715809} is an apocalyptic number.

2206867715809 is the 1485553-rd square number.

2206867715809 is the 742777-th centered octagonal number.

It is an amenable number.

2206867715809 is a deficient number, since it is larger than the sum of its proper divisors (181710328082).

2206867715809 is an frugal number, since it uses more digits than its factorization.

2206867715809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3934 (or 1967 counting only the distinct ones).

The product of its (nonzero) digits is 20321280, while the sum is 61.

The spelling of 2206867715809 in words is "two trillion, two hundred six billion, eight hundred sixty-seven million, seven hundred fifteen thousand, eight hundred nine".