61118980 has 48 divisors (see below), whose sum is σ = 142700544. Its totient is φ = 21836160.

The previous prime is 61118951. The next prime is 61118989. The reversal of 61118980 is 8981116.

It is not an unprimeable number, because it can be changed into a prime (61118989) 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, 4269 + ... + 11851.

It is an arithmetic number, because the mean of its divisors is an integer number (2972928).

Almost surely, 2^61118980 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 61118980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71350272).

61118980 is an abundant number, since it is smaller than the sum of its proper divisors (81581564).

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

61118980 is a wasteful number, since it uses less digits than its factorization.

61118980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7636 (or 7634 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 34.

The square root of 61118980 is about 7817.8628793296. The cubic root of 61118980 is about 393.9054889390.

It can be divided in two parts, 611 and 18980, that added together give a palindrome (19591).

The spelling of 61118980 in words is "sixty-one million, one hundred eighteen thousand, nine hundred eighty".