220847912640 has 280 divisors, whose sum is σ = 798915577680. Its totient is φ = 57894193152.

The previous prime is 220847912629. The next prime is 220847912647. The reversal of 220847912640 is 46219748022.

220847912640 is a `hidden beast` number, since 220 + 84 + 7 + 91 + 264 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (220847912647) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1457074 + ... + 1601486.

Almost surely, 2^220847912640 is an apocalyptic number.

220847912640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 220847912640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (399457788840).

220847912640 is an abundant number, since it is smaller than the sum of its proper divisors (578067665040).

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

220847912640 is a wasteful number, since it uses less digits than its factorization.

220847912640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144501 (or 144482 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The spelling of 220847912640 in words is "two hundred twenty billion, eight hundred forty-seven million, nine hundred twelve thousand, six hundred forty".