220757779281 has 12 divisors (see below), whose sum is σ = 318727208688. Its totient is φ = 135850940784.

The previous prime is 220757779273. The next prime is 220757779373. The reversal of 220757779281 is 182977757022.

It is a happy number.

It is not a de Polignac number, because 220757779281 - 2³ = 220757779273 is a prime.

It is a super-2 number, since 2×220757779281² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (220757779381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 217709335 + ... + 217710348.

It is an arithmetic number, because the mean of its divisors is an integer number (26560600724).

Almost surely, 2^220757779281 is an apocalyptic number.

It is an amenable number.

220757779281 is a deficient number, since it is larger than the sum of its proper divisors (97969429407).

220757779281 is a wasteful number, since it uses less digits than its factorization.

220757779281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435419712 (or 435419699 counting only the distinct ones).

The product of its (nonzero) digits is 6914880, while the sum is 57.

The spelling of 220757779281 in words is "two hundred twenty billion, seven hundred fifty-seven million, seven hundred seventy-nine thousand, two hundred eighty-one".