611223056420 has 12 divisors (see below), whose sum is σ = 1283568418524. Its totient is φ = 244489222560.

The previous prime is 611223056377. The next prime is 611223056467. The reversal of 611223056420 is 24650322116.

611223056420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 246206500864 + 365016555556 = 496192^2 + 604166^2 .

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, 15280576391 + ... + 15280576430.

It is an arithmetic number, because the mean of its divisors is an integer number (106964034877).

Almost surely, 2^611223056420 is an apocalyptic number.

It is an amenable number.

611223056420 is an abundant number, since it is smaller than the sum of its proper divisors (672345362104).

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

611223056420 is a wasteful number, since it uses less digits than its factorization.

611223056420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30561152830 (or 30561152828 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

Adding to 611223056420 its reverse (24650322116), we get a palindrome (635873378536).

The spelling of 611223056420 in words is "six hundred eleven billion, two hundred twenty-three million, fifty-six thousand, four hundred twenty".