61165650673 has 2 divisors, whose sum is σ = 61165650674. Its totient is φ = 61165650672.

The previous prime is 61165650583. The next prime is 61165650677. The reversal of 61165650673 is 37605656116.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58630326769 + 2535323904 = 242137^2 + 50352^2 .

It is a cyclic number.

It is not a de Polignac number, because 61165650673 - 2²⁵ = 61132096241 is a prime.

It is not a weakly prime, because it can be changed into another prime (61165650677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30582825336 + 30582825337.

It is an arithmetic number, because the mean of its divisors is an integer number (30582825337).

Almost surely, 2^61165650673 is an apocalyptic number.

It is an amenable number.

61165650673 is a deficient number, since it is larger than the sum of its proper divisors (1).

61165650673 is an equidigital number, since it uses as much as digits as its factorization.

61165650673 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 680400, while the sum is 46.

The spelling of 61165650673 in words is "sixty-one billion, one hundred sixty-five million, six hundred fifty thousand, six hundred seventy-three".