61180218 has 64 divisors (see below), whose sum is σ = 149667840. Its totient is φ = 18370800.

The previous prime is 61180211. The next prime is 61180237. The reversal of 61180218 is 81208116.

61180218 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 61180191 and 61180200.

It is not an unprimeable number, because it can be changed into a prime (61180211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 75033 + ... + 75843.

It is an arithmetic number, because the mean of its divisors is an integer number (2338560).

Almost surely, 2^61180218 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61180218, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74833920).

61180218 is an abundant number, since it is smaller than the sum of its proper divisors (88487622).

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

61180218 is a wasteful number, since it uses less digits than its factorization.

61180218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 960 (or 954 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 27.

The square root of 61180218 is about 7821.7784422726. The cubic root of 61180218 is about 394.0370025457.

The spelling of 61180218 in words is "sixty-one million, one hundred eighty thousand, two hundred eighteen".