61780368 has 80 divisors (see below), whose sum is σ = 173141696. Its totient is φ = 18869760.

The previous prime is 61780361. The next prime is 61780391. The reversal of 61780368 is 86308716.

61780368 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 (39).

It is not an unprimeable number, because it can be changed into a prime (61780361) 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 15 ways as a sum of consecutive naturals, for example, 112671 + ... + 113217.

Almost surely, 2^61780368 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 61780368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86570848).

61780368 is an abundant number, since it is smaller than the sum of its proper divisors (111361328).

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

61780368 is a wasteful number, since it uses less digits than its factorization.

61780368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 752 (or 746 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 61780368 is about 7860.0488548100. The cubic root of 61780368 is about 395.3212533684.

The spelling of 61780368 in words is "sixty-one million, seven hundred eighty thousand, three hundred sixty-eight".