77810969485 has 8 divisors (see below), whose sum is σ = 93856963320. Its totient is φ = 61926242304.

The previous prime is 77810969461. The next prime is 77810969519. The reversal of 77810969485 is 58496901877.

It can be written as a sum of positive squares in 4 ways, for example, as 391802436 + 77419167049 = 19794^2 + 278243^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 77810969485 - 2¹⁵ = 77810936717 is a prime.

It is a super-3 number, since 3×77810969485³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 40315600 + ... + 40317529.

It is an arithmetic number, because the mean of its divisors is an integer number (11732120415).

Almost surely, 2^77810969485 is an apocalyptic number.

It is an amenable number.

77810969485 is a deficient number, since it is larger than the sum of its proper divisors (16045993835).

77810969485 is a wasteful number, since it uses less digits than its factorization.

77810969485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80633327.

The product of its (nonzero) digits is 30481920, while the sum is 64.

The spelling of 77810969485 in words is "seventy-seven billion, eight hundred ten million, nine hundred sixty-nine thousand, four hundred eighty-five".