73766723617 has 2 divisors, whose sum is σ = 73766723618. Its totient is φ = 73766723616.

The previous prime is 73766723587. The next prime is 73766723623. The reversal of 73766723617 is 71632766737.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61813893376 + 11952830241 = 248624^2 + 109329^2 .

It is a cyclic number.

It is not a de Polignac number, because 73766723617 - 2¹¹ = 73766721569 is a prime.

It is not a weakly prime, because it can be changed into another prime (73766723417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36883361808 + 36883361809.

It is an arithmetic number, because the mean of its divisors is an integer number (36883361809).

Almost surely, 2^73766723617 is an apocalyptic number.

It is an amenable number.

73766723617 is a deficient number, since it is larger than the sum of its proper divisors (1).

73766723617 is an equidigital number, since it uses as much as digits as its factorization.

73766723617 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9335088, while the sum is 55.

The spelling of 73766723617 in words is "seventy-three billion, seven hundred sixty-six million, seven hundred twenty-three thousand, six hundred seventeen".