61680344 has 32 divisors (see below), whose sum is σ = 127180800. Its totient is φ = 27810720.

The previous prime is 61680337. The next prime is 61680373. The reversal of 61680344 is 44308616.

It is a self number, because there is not a number n which added to its sum of digits gives 61680344.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8417 + ... + 13935.

It is an arithmetic number, because the mean of its divisors is an integer number (3974400).

Almost surely, 2^61680344 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 61680344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63590400).

61680344 is an abundant number, since it is smaller than the sum of its proper divisors (65500456).

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

61680344 is a wasteful number, since it uses less digits than its factorization.

61680344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5663 (or 5659 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 61680344 is about 7853.6834670109. The cubic root of 61680344 is about 395.1077930456.

The spelling of 61680344 in words is "sixty-one million, six hundred eighty thousand, three hundred forty-four".