61564042 has 16 divisors (see below), whose sum is σ = 97864200. Its totient is φ = 28994560.

The previous prime is 61564037. The next prime is 61564051. The reversal of 61564042 is 24046516.

61564042 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 53275401 + 8288641 = 7299^2 + 2879^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 61564042.

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, 10567 + ... + 15322.

Almost surely, 2^61564042 is an apocalyptic number.

61564042 is a deficient number, since it is larger than the sum of its proper divisors (36300158).

61564042 is a wasteful number, since it uses less digits than its factorization.

61564042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25961.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 61564042 is about 7846.2756770330. The cubic root of 61564042 is about 394.8593036269.

The spelling of 61564042 in words is "sixty-one million, five hundred sixty-four thousand, forty-two".