77777399999 has 8 divisors (see below), whose sum is σ = 83765819760. Its totient is φ = 71789772096.

The previous prime is 77777399983. The next prime is 77777400079. The reversal of 77777399999 is 99999377777.

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 77777399999 - 2⁴ = 77777399983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77777399699) 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, 14492 + ... + 394670.

It is an arithmetic number, because the mean of its divisors is an integer number (10470727470).

Almost surely, 2^77777399999 is an apocalyptic number.

77777399999 is a deficient number, since it is larger than the sum of its proper divisors (5988419761).

77777399999 is a wasteful number, since it uses less digits than its factorization.

77777399999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395929.

The product of its digits is 2977309629, while the sum is 83.

The spelling of 77777399999 in words is "seventy-seven billion, seven hundred seventy-seven million, three hundred ninety-nine thousand, nine hundred ninety-nine".