61776530 has 16 divisors (see below), whose sum is σ = 113021784. Its totient is φ = 24305280.

The previous prime is 61776529. The next prime is 61776541. The reversal of 61776530 is 3567716.

61776530 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 49547521 + 12229009 = 7039^2 + 3497^2 .

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 50027 + ... + 51246.

Almost surely, 2^61776530 is an apocalyptic number.

61776530 is a deficient number, since it is larger than the sum of its proper divisors (51245254).

61776530 is a wasteful number, since it uses less digits than its factorization.

61776530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101341.

The product of its (nonzero) digits is 26460, while the sum is 35.

The square root of 61776530 is about 7859.8047049529. The cubic root of 61776530 is about 395.3130669794.

The spelling of 61776530 in words is "sixty-one million, seven hundred seventy-six thousand, five hundred thirty".