220585987128 has 32 divisors (see below), whose sum is σ = 593885350800. Its totient is φ = 67872611328.

The previous prime is 220585987099. The next prime is 220585987157. The reversal of 220585987128 is 821789585022.

It is an interprime number because it is at equal distance from previous prime (220585987099) and next prime (220585987157).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 353502873 + ... + 353503496.

Almost surely, 2^220585987128 is an apocalyptic number.

It is an amenable number.

220585987128 is an abundant number, since it is smaller than the sum of its proper divisors (373299363672).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

220585987128 is a wasteful number, since it uses less digits than its factorization.

220585987128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 707006391 (or 707006387 counting only the distinct ones).

The product of its (nonzero) digits is 6451200, while the sum is 57.

The spelling of 220585987128 in words is "two hundred twenty billion, five hundred eighty-five million, nine hundred eighty-seven thousand, one hundred twenty-eight".