61535158273 has 2 divisors, whose sum is σ = 61535158274. Its totient is φ = 61535158272.

The previous prime is 61535158219. The next prime is 61535158291. The reversal of 61535158273 is 37285153516.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35453877264 + 26081281009 = 188292^2 + 161497^2 .

It is a cyclic number.

It is not a de Polignac number, because 61535158273 - 2¹³ = 61535150081 is a prime.

It is not a weakly prime, because it can be changed into another prime (61530158273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30767579136 + 30767579137.

It is an arithmetic number, because the mean of its divisors is an integer number (30767579137).

It is a Proth number, since it is equal to 117369 ⋅ 2¹⁹ + 1 and 117369 < 2¹⁹.

Almost surely, 2^61535158273 is an apocalyptic number.

It is an amenable number.

61535158273 is a deficient number, since it is larger than the sum of its proper divisors (1).

61535158273 is an equidigital number, since it uses as much as digits as its factorization.

61535158273 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 756000, while the sum is 46.

The spelling of 61535158273 in words is "sixty-one billion, five hundred thirty-five million, one hundred fifty-eight thousand, two hundred seventy-three".