61618536383573 has 32 divisors (see below), whose sum is σ = 71489131308000. Its totient is φ = 52603234983936.

The previous prime is 61618536383557. The next prime is 61618536383597. The reversal of 61618536383573 is 37538363581616.

It can be written as a sum of positive squares in 16 ways, for example, as 17949991248049 + 43668545135524 = 4236743^2 + 6608218^2 .

It is not a de Polignac number, because 61618536383573 - 2⁴ = 61618536383557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61618536383533) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2759498 + ... + 11439051.

It is an arithmetic number, because the mean of its divisors is an integer number (2234035353375).

Almost surely, 2^{61618536383573} is an apocalyptic number.

It is an amenable number.

61618536383573 is a deficient number, since it is larger than the sum of its proper divisors (9870594924427).

61618536383573 is a wasteful number, since it uses less digits than its factorization.

61618536383573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14198921.

The product of its digits is 195955200, while the sum is 65.

The spelling of 61618536383573 in words is "sixty-one trillion, six hundred eighteen billion, five hundred thirty-six million, three hundred eighty-three thousand, five hundred seventy-three".