61565061 has 16 divisors (see below), whose sum is σ = 83692224. Its totient is φ = 40247424.

The previous prime is 61565059. The next prime is 61565069. The reversal of 61565061 is 16056516.

61565061 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 61565061 - 2¹ = 61565059 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61565069) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 42430 + ... + 43856.

It is an arithmetic number, because the mean of its divisors is an integer number (5230764).

Almost surely, 2^61565061 is an apocalyptic number.

It is an amenable number.

61565061 is a deficient number, since it is larger than the sum of its proper divisors (22127163).

61565061 is a wasteful number, since it uses less digits than its factorization.

61565061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1700.

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 61565061 is about 7846.3406120306. The cubic root of 61565061 is about 394.8614821681.

The spelling of 61565061 in words is "sixty-one million, five hundred sixty-five thousand, sixty-one".