77849418939 has 8 divisors (see below), whose sum is σ = 104203114320. Its totient is φ = 51697668096.

The previous prime is 77849418937. The next prime is 77849418973. The reversal of 77849418939 is 93981494877.

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

It is not a de Polignac number, because 77849418939 - 2¹ = 77849418937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77849418937) by changing a digit.

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, 50485234 + ... + 50486775.

It is an arithmetic number, because the mean of its divisors is an integer number (13025389290).

Almost surely, 2^77849418939 is an apocalyptic number.

77849418939 is a deficient number, since it is larger than the sum of its proper divisors (26353695381).

77849418939 is a wasteful number, since it uses less digits than its factorization.

77849418939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100972269.

The product of its digits is 109734912, while the sum is 69.

The spelling of 77849418939 in words is "seventy-seven billion, eight hundred forty-nine million, four hundred eighteen thousand, nine hundred thirty-nine".