61142273173 has 2 divisors, whose sum is σ = 61142273174. Its totient is φ = 61142273172.

The previous prime is 61142273099. The next prime is 61142273177. The reversal of 61142273173 is 37137224116.

61142273173 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37551463524 + 23590809649 = 193782^2 + 153593^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61142273173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61142273177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30571136586 + 30571136587.

It is an arithmetic number, because the mean of its divisors is an integer number (30571136587).

Almost surely, 2^61142273173 is an apocalyptic number.

It is an amenable number.

61142273173 is a deficient number, since it is larger than the sum of its proper divisors (1).

61142273173 is an equidigital number, since it uses as much as digits as its factorization.

61142273173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42336, while the sum is 37.

Adding to 61142273173 its reverse (37137224116), we get a palindrome (98279497289).

The spelling of 61142273173 in words is "sixty-one billion, one hundred forty-two million, two hundred seventy-three thousand, one hundred seventy-three".