61158573732673 has 6 divisors (see below), whose sum is σ = 63195071506242. Its totient is φ = 59185716514560.

The previous prime is 61158573732647. The next prime is 61158573732731. The reversal of 61158573732673 is 37623737585116.

It can be written as a sum of positive squares in only one way, i.e., 50911193203264 + 10247380529409 = 7135208^2 + 3201153^2 .

It is not a de Polignac number, because 61158573732673 - 2¹³ = 61158573724481 is a prime.

It is a super-2 number, since 2×61158573732673² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61158573732073) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 31820276736 + ... + 31820278657.

It is an arithmetic number, because the mean of its divisors is an integer number (10532511917707).

Almost surely, 2^{61158573732673} is an apocalyptic number.

It is an amenable number.

61158573732673 is a deficient number, since it is larger than the sum of its proper divisors (2036497773569).

61158573732673 is an equidigital number, since it uses as much as digits as its factorization.

61158573732673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63640555455 (or 63640555424 counting only the distinct ones).

The product of its digits is 133358400, while the sum is 64.

The spelling of 61158573732673 in words is "sixty-one trillion, one hundred fifty-eight billion, five hundred seventy-three million, seven hundred thirty-two thousand, six hundred seventy-three".