61306116220 has 96 divisors (see below), whose sum is σ = 135234570240. Its totient is φ = 23321675520.

The previous prime is 61306116217. The next prime is 61306116293. The reversal of 61306116220 is 2261160316.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6490261 + ... + 6499699.

It is an arithmetic number, because the mean of its divisors is an integer number (1408693440).

Almost surely, 2^61306116220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61306116220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67617285120).

61306116220 is an abundant number, since it is smaller than the sum of its proper divisors (73928454020).

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

61306116220 is a wasteful number, since it uses less digits than its factorization.

61306116220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9683 (or 9681 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

Adding to 61306116220 its reverse (2261160316), we get a palindrome (63567276536).

The spelling of 61306116220 in words is "sixty-one billion, three hundred six million, one hundred sixteen thousand, two hundred twenty".