61541331605530 has 48 divisors (see below), whose sum is σ = 129166093931976. Its totient is φ = 21049766559360.

The previous prime is 61541331605431. The next prime is 61541331605543. The reversal of 61541331605530 is 3550613314516.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 26367619073481 + 35173712532049 = 5134941^2 + 5930743^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 148955889 + ... + 149368468.

Almost surely, 2^{61541331605530} is an apocalyptic number.

61541331605530 is an abundant number, since it is smaller than the sum of its proper divisors (67624762326446).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61541331605530 is a wasteful number, since it uses less digits than its factorization.

61541331605530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298324799 (or 298324792 counting only the distinct ones).

The product of its (nonzero) digits is 486000, while the sum is 43.

The spelling of 61541331605530 in words is "sixty-one trillion, five hundred forty-one billion, three hundred thirty-one million, six hundred five thousand, five hundred thirty".