61780960 has 24 divisors (see below), whose sum is σ = 145957896. Its totient is φ = 24712320.

The previous prime is 61780919. The next prime is 61780963. The reversal of 61780960 is 6908716.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61780963) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 192906 + ... + 193225.

It is an arithmetic number, because the mean of its divisors is an integer number (6081579).

Almost surely, 2^61780960 is an apocalyptic number.

It is an amenable number.

61780960 is an abundant number, since it is smaller than the sum of its proper divisors (84176936).

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

61780960 is a wasteful number, since it uses less digits than its factorization.

61780960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386146 (or 386138 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 61780960 is about 7860.0865135188. The cubic root of 61780960 is about 395.3225160642.

The spelling of 61780960 in words is "sixty-one million, seven hundred eighty thousand, nine hundred sixty".