61144580 has 96 divisors (see below), whose sum is σ = 162279936. Its totient is φ = 18855936.

The previous prime is 61144547. The next prime is 61144583. The reversal of 61144580 is 8544116.

61144580 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (61144583) 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, 54182 + ... + 55298.

It is an arithmetic number, because the mean of its divisors is an integer number (1690416).

Almost surely, 2^61144580 is an apocalyptic number.

It is a pronic number, being equal to 7819×7820.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61144580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81139968).

61144580 is an abundant number, since it is smaller than the sum of its proper divisors (101135356).

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

61144580 is a wasteful number, since it uses less digits than its factorization.

61144580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1173 (or 1171 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 61144580 is about 7819.4999840143. The cubic root of 61144580 is about 393.9604777108.

Adding to 61144580 its reverse (8544116), we get a palindrome (69688696).

The spelling of 61144580 in words is "sixty-one million, one hundred forty-four thousand, five hundred eighty".