61603384946728 has 32 divisors (see below), whose sum is σ = 116061133775400. Its totient is φ = 30654092136448.

The previous prime is 61603384946669. The next prime is 61603384946729. The reversal of 61603384946728 is 82764948330616.

It can be written as a sum of positive squares in 4 ways, for example, as 49782592039684 + 11820792907044 = 7055678^2 + 3438138^2 .

It is not an unprimeable number, because it can be changed into a prime (61603384946729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19991101 + ... + 22865932.

Almost surely, 2^{61603384946728} is an apocalyptic number.

It is an amenable number.

61603384946728 is a deficient number, since it is larger than the sum of its proper divisors (54457748828672).

61603384946728 is a wasteful number, since it uses less digits than its factorization.

61603384946728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42857901 (or 42857897 counting only the distinct ones).

The product of its (nonzero) digits is 250822656, while the sum is 67.

The spelling of 61603384946728 in words is "sixty-one trillion, six hundred three billion, three hundred eighty-four million, nine hundred forty-six thousand, seven hundred twenty-eight".