61709112 has 96 divisors (see below), whose sum is σ = 178464000. Its totient is φ = 19206720.

The previous prime is 61709111. The next prime is 61709143. The reversal of 61709112 is 21190716.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61709111) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 107787 + ... + 108357.

It is an arithmetic number, because the mean of its divisors is an integer number (1859000).

Almost surely, 2^61709112 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 61709112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89232000).

61709112 is an abundant number, since it is smaller than the sum of its proper divisors (116754888).

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

61709112 is a wasteful number, since it uses less digits than its factorization.

61709112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 681 (or 674 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 27.

The square root of 61709112 is about 7855.5147507977. The cubic root of 61709112 is about 395.1692102038.

Adding to 61709112 its reverse (21190716), we get a palindrome (82899828).

The spelling of 61709112 in words is "sixty-one million, seven hundred nine thousand, one hundred twelve".