77398430173 has 8 divisors (see below), whose sum is σ = 77557270392. Its totient is φ = 77239662336.

The previous prime is 77398430159. The next prime is 77398430183. The reversal of 77398430173 is 37103489377.

It can be written as a sum of positive squares in 4 ways, for example, as 11479408164 + 65919022009 = 107142^2 + 256747^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 77398430173 - 2¹⁷ = 77398299101 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 77398430173.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77398430183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2466961 + ... + 2498137.

It is an arithmetic number, because the mean of its divisors is an integer number (9694658799).

Almost surely, 2^77398430173 is an apocalyptic number.

It is an amenable number.

77398430173 is a deficient number, since it is larger than the sum of its proper divisors (158840219).

77398430173 is a wasteful number, since it uses less digits than its factorization.

77398430173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36191.

The product of its (nonzero) digits is 2667168, while the sum is 52.

The spelling of 77398430173 in words is "seventy-seven billion, three hundred ninety-eight million, four hundred thirty thousand, one hundred seventy-three".