220678954917 has 16 divisors (see below), whose sum is σ = 301096741440. Its totient is φ = 143690585472.

The previous prime is 220678954901. The next prime is 220678954921. The reversal of 220678954917 is 719459876022.

It is not a de Polignac number, because 220678954917 - 2⁴ = 220678954901 is a prime.

It is a super-2 number, since 2×220678954917² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220678954957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3793273 + ... + 3851009.

It is an arithmetic number, because the mean of its divisors is an integer number (18818546340).

Almost surely, 2^220678954917 is an apocalyptic number.

It is an amenable number.

220678954917 is a deficient number, since it is larger than the sum of its proper divisors (80417786523).

220678954917 is a wasteful number, since it uses less digits than its factorization.

220678954917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87412.

The product of its (nonzero) digits is 15240960, while the sum is 60.

The spelling of 220678954917 in words is "two hundred twenty billion, six hundred seventy-eight million, nine hundred fifty-four thousand, nine hundred seventeen".