220611641520 has 40 divisors (see below), whose sum is σ = 683896089456. Its totient is φ = 58829771008.

The previous prime is 220611641483. The next prime is 220611641531. The reversal of 220611641520 is 25146116022.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 459607347 + ... + 459607826.

Almost surely, 2^220611641520 is an apocalyptic number.

220611641520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220611641520 is an abundant number, since it is smaller than the sum of its proper divisors (463284447936).

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

220611641520 is a wasteful number, since it uses less digits than its factorization.

220611641520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 919215189 (or 919215183 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

Adding to 220611641520 its reverse (25146116022), we get a palindrome (245757757542).

The spelling of 220611641520 in words is "two hundred twenty billion, six hundred eleven million, six hundred forty-one thousand, five hundred twenty".