61085980 has 12 divisors (see below), whose sum is σ = 128280600. Its totient is φ = 24434384.

The previous prime is 61085963. The next prime is 61085987. The reversal of 61085980 is 8958016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61085987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1527130 + ... + 1527169.

It is an arithmetic number, because the mean of its divisors is an integer number (10690050).

Almost surely, 2^61085980 is an apocalyptic number.

It is an amenable number.

61085980 is an abundant number, since it is smaller than the sum of its proper divisors (67194620).

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

61085980 is a wasteful number, since it uses less digits than its factorization.

61085980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3054308 (or 3054306 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 37.

The square root of 61085980 is about 7815.7520431498. The cubic root of 61085980 is about 393.8345823165.

The spelling of 61085980 in words is "sixty-one million, eighty-five thousand, nine hundred eighty".