77689696919 has 8 divisors (see below), whose sum is σ = 78519582720. Its totient is φ = 76863220056.

The previous prime is 77689696901. The next prime is 77689696951. The reversal of 77689696919 is 91969698677.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77689696919 is a prime.

It is a super-2 number, since 2×77689696919² (a number of 23 digits) contains 22 as substring.

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 77689696919.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77689696979) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 806399 + ... + 897584.

It is an arithmetic number, because the mean of its divisors is an integer number (9814947840).

Almost surely, 2^77689696919 is an apocalyptic number.

77689696919 is a deficient number, since it is larger than the sum of its proper divisors (829885801).

77689696919 is a wasteful number, since it uses less digits than its factorization.

77689696919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1704469.

The product of its digits is 555532992, while the sum is 77.

The spelling of 77689696919 in words is "seventy-seven billion, six hundred eighty-nine million, six hundred ninety-six thousand, nine hundred nineteen".