61170220220 has 12 divisors (see below), whose sum is σ = 128457462504. Its totient is φ = 24468088080.

The previous prime is 61170220213. The next prime is 61170220271. The reversal of 61170220220 is 2202207116.

It is a happy number.

It is a congruent number.

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, 1529255486 + ... + 1529255525.

It is an arithmetic number, because the mean of its divisors is an integer number (10704788542).

Almost surely, 2^61170220220 is an apocalyptic number.

It is an amenable number.

61170220220 is an abundant number, since it is smaller than the sum of its proper divisors (67287242284).

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

61170220220 is a wasteful number, since it uses less digits than its factorization.

61170220220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3058511020 (or 3058511018 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 23.

Adding to 61170220220 its reverse (2202207116), we get a palindrome (63372427336).

The spelling of 61170220220 in words is "sixty-one billion, one hundred seventy million, two hundred twenty thousand, two hundred twenty".