61220335228 has 48 divisors (see below), whose sum is σ = 120705750144. Its totient is φ = 26979816960.

The previous prime is 61220335199. The next prime is 61220335229. The reversal of 61220335228 is 82253302216.

It is a junction number, because it is equal to n+sod(n) for n = 61220335193 and 61220335202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61220335229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 205275 + ... + 405682.

It is an arithmetic number, because the mean of its divisors is an integer number (2514703128).

Almost surely, 2^61220335228 is an apocalyptic number.

It is an amenable number.

61220335228 is a deficient number, since it is larger than the sum of its proper divisors (59485414916).

61220335228 is a wasteful number, since it uses less digits than its factorization.

61220335228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611062 (or 611060 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 34.

The spelling of 61220335228 in words is "sixty-one billion, two hundred twenty million, three hundred thirty-five thousand, two hundred twenty-eight".