2206540738671 has 4 divisors (see below), whose sum is σ = 2942054318232. Its totient is φ = 1471027159112.

The previous prime is 2206540738669. The next prime is 2206540738739. The reversal of 2206540738671 is 1768370456022.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2206540738671 - 2¹ = 2206540738669 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2206540738631) 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, 367756789776 + ... + 367756789781.

It is an arithmetic number, because the mean of its divisors is an integer number (735513579558).

Almost surely, 2^{2206540738671} is an apocalyptic number.

2206540738671 is a deficient number, since it is larger than the sum of its proper divisors (735513579561).

2206540738671 is an equidigital number, since it uses as much as digits as its factorization.

2206540738671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 735513579560.

The product of its (nonzero) digits is 3386880, while the sum is 51.

The spelling of 2206540738671 in words is "two trillion, two hundred six billion, five hundred forty million, seven hundred thirty-eight thousand, six hundred seventy-one".