61730556 has 24 divisors (see below), whose sum is σ = 145093200. Its totient is φ = 20426112.

The previous prime is 61730533. The next prime is 61730561. The reversal of 61730556 is 65503716.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17131 + ... + 20418.

It is an arithmetic number, because the mean of its divisors is an integer number (6045550).

Almost surely, 2^61730556 is an apocalyptic number.

It is an amenable number.

61730556 is an abundant number, since it is smaller than the sum of its proper divisors (83362644).

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

61730556 is a wasteful number, since it uses less digits than its factorization.

61730556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37693 (or 37691 counting only the distinct ones).

The product of its (nonzero) digits is 18900, while the sum is 33.

The square root of 61730556 is about 7856.8795332498. The cubic root of 61730556 is about 395.2149788479.

The spelling of 61730556 in words is "sixty-one million, seven hundred thirty thousand, five hundred fifty-six".