77834403839 has 8 divisors (see below), whose sum is σ = 78983009280. Its totient is φ = 76687252600.

The previous prime is 77834403833. The next prime is 77834403863. The reversal of 77834403839 is 93830443877.

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-77834403839 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 (77834403833) 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, 255479 + ... + 470040.

It is an arithmetic number, because the mean of its divisors is an integer number (9872876160).

Almost surely, 2^77834403839 is an apocalyptic number.

77834403839 is a deficient number, since it is larger than the sum of its proper divisors (1148605441).

77834403839 is a wasteful number, since it uses less digits than its factorization.

77834403839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 727101.

The product of its (nonzero) digits is 12192768, while the sum is 56.

The spelling of 77834403839 in words is "seventy-seven billion, eight hundred thirty-four million, four hundred three thousand, eight hundred thirty-nine".