220388959779287 has 4 divisors (see below), whose sum is σ = 237341956685400. Its totient is φ = 203435962873176.

The previous prime is 220388959779283. The next prime is 220388959779299. The reversal of 220388959779287 is 782977959883022.

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 220388959779287 - 2² = 220388959779283 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220388959779199 and 220388959779208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220388959779283) 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, 8476498453037 + ... + 8476498453062.

It is an arithmetic number, because the mean of its divisors is an integer number (59335489171350).

Almost surely, 2^{220388959779287} is an apocalyptic number.

220388959779287 is a deficient number, since it is larger than the sum of its proper divisors (16952996906113).

220388959779287 is a wasteful number, since it uses less digits than its factorization.

220388959779287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16952996906112.

The product of its (nonzero) digits is 15362887680, while the sum is 86.

The spelling of 220388959779287 in words is "two hundred twenty trillion, three hundred eighty-eight billion, nine hundred fifty-nine million, seven hundred seventy-nine thousand, two hundred eighty-seven".