61561936 has 10 divisors (see below), whose sum is σ = 119276282. Its totient is φ = 30780960.

The previous prime is 61561933. The next prime is 61561943. The reversal of 61561936 is 63916516.

61561936 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 only one way, i.e., 46785600 + 14776336 = 6840^2 + 3844^2 .

It is a junction number, because it is equal to n+sod(n) for n = 61561895 and 61561904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61561931) 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 as a sum of consecutive naturals, namely, 1923795 + ... + 1923826.

Almost surely, 2^61561936 is an apocalyptic number.

It is an amenable number.

61561936 is a deficient number, since it is larger than the sum of its proper divisors (57714346).

61561936 is a wasteful number, since it uses less digits than its factorization.

61561936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3847629 (or 3847623 counting only the distinct ones).

The product of its digits is 29160, while the sum is 37.

The square root of 61561936 is about 7846.1414720868. The cubic root of 61561936 is about 394.8548010896.

The spelling of 61561936 in words is "sixty-one million, five hundred sixty-one thousand, nine hundred thirty-six".