61603816 has 16 divisors (see below), whose sum is σ = 118629540. Its totient is φ = 29969280.

The previous prime is 61603811. The next prime is 61603849. The reversal of 61603816 is 61830616.

It can be written as a sum of positive squares in 2 ways, for example, as 61559716 + 44100 = 7846^2 + 210^2 .

It is not an unprimeable number, because it can be changed into a prime (61603811) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 103765 + ... + 104356.

Almost surely, 2^61603816 is an apocalyptic number.

It is an amenable number.

61603816 is a deficient number, since it is larger than the sum of its proper divisors (57025724).

61603816 is a wasteful number, since it uses less digits than its factorization.

61603816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208164 (or 208160 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 61603816 is about 7848.8098460849. The cubic root of 61603816 is about 394.9443194494.

The spelling of 61603816 in words is "sixty-one million, six hundred three thousand, eight hundred sixteen".