218892739549 has 8 divisors (see below), whose sum is σ = 238952468160. Its totient is φ = 198859742400.

The previous prime is 218892739543. The next prime is 218892739553. The reversal of 218892739549 is 945937298812.

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

It is not a de Polignac number, because 218892739549 - 2³¹ = 216745255901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218892739543) 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, 6665737 + ... + 6698494.

It is an arithmetic number, because the mean of its divisors is an integer number (29869058520).

Almost surely, 2^218892739549 is an apocalyptic number.

It is an amenable number.

218892739549 is a deficient number, since it is larger than the sum of its proper divisors (20059728611).

218892739549 is a wasteful number, since it uses less digits than its factorization.

218892739549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13365731.

The product of its digits is 78382080, while the sum is 67.

It can be divided in two parts, 218892 and 739549, that added together give a square (958441 = 979²).

The spelling of 218892739549 in words is "two hundred eighteen billion, eight hundred ninety-two million, seven hundred thirty-nine thousand, five hundred forty-nine".