77213850139 has 4 divisors (see below), whose sum is σ = 77216888056. Its totient is φ = 77210812224.

The previous prime is 77213850101. The next prime is 77213850149. The reversal of 77213850139 is 93105831277.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 77213850139 - 2⁷ = 77213850011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77213850149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1480509 + ... + 1531774.

It is an arithmetic number, because the mean of its divisors is an integer number (19304222014).

Almost surely, 2^77213850139 is an apocalyptic number.

77213850139 is a deficient number, since it is larger than the sum of its proper divisors (3037917).

77213850139 is a wasteful number, since it uses less digits than its factorization.

77213850139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3037916.

The product of its (nonzero) digits is 317520, while the sum is 46.

The spelling of 77213850139 in words is "seventy-seven billion, two hundred thirteen million, eight hundred fifty thousand, one hundred thirty-nine".