61180812 has 144 divisors (see below), whose sum is σ = 201479040. Its totient is φ = 15876000.

The previous prime is 61180729. The next prime is 61180831. The reversal of 61180812 is 21808116.

61180812 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 57687 + ... + 58737.

It is an arithmetic number, because the mean of its divisors is an integer number (1399160).

Almost surely, 2^61180812 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 61180812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100739520).

61180812 is an abundant number, since it is smaller than the sum of its proper divisors (140298228).

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

61180812 is a wasteful number, since it uses less digits than its factorization.

61180812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1089 (or 1074 counting only the distinct ones).

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

The square root of 61180812 is about 7821.8164130846. The cubic root of 61180812 is about 394.0382777794.

Adding to 61180812 its reverse (21808116), we get a palindrome (82988928).

The spelling of 61180812 in words is "sixty-one million, one hundred eighty thousand, eight hundred twelve".