220611521456 has 20 divisors (see below), whose sum is σ = 437860063704. Its totient is φ = 107615376000.

The previous prime is 220611521441. The next prime is 220611521531. The reversal of 220611521456 is 654125116022.

It is a super-2 number, since 2×220611521456² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 168148370 + ... + 168149681.

Almost surely, 2^220611521456 is an apocalyptic number.

It is an amenable number.

220611521456 is a deficient number, since it is larger than the sum of its proper divisors (217248542248).

220611521456 is a wasteful number, since it uses less digits than its factorization.

220611521456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336298100 (or 336298094 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 35.

Adding to 220611521456 its reverse (654125116022), we get a palindrome (874736637478).

The spelling of 220611521456 in words is "two hundred twenty billion, six hundred eleven million, five hundred twenty-one thousand, four hundred fifty-six".