61609330240 has 112 divisors (see below), whose sum is σ = 147914807040. Its totient is φ = 24441661440.

The previous prime is 61609330187. The next prime is 61609330243. The reversal of 61609330240 is 4203390616.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 61609330196 and 61609330205.

It is not an unprimeable number, because it can be changed into a prime (61609330243) 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, 25425669 + ... + 25428091.

It is an arithmetic number, because the mean of its divisors is an integer number (1320667920).

Almost surely, 2^61609330240 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 61609330240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73957403520).

61609330240 is an abundant number, since it is smaller than the sum of its proper divisors (86305476800).

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

61609330240 is a wasteful number, since it uses less digits than its factorization.

61609330240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3060 (or 3050 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 34.

The spelling of 61609330240 in words is "sixty-one billion, six hundred nine million, three hundred thirty thousand, two hundred forty".