77744138119 has 4 divisors (see below), whose sum is σ = 77751603160. Its totient is φ = 77736673080.

The previous prime is 77744138107. The next prime is 77744138177. The reversal of 77744138119 is 91183144777.

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 77744138119 - 2⁹ = 77744137607 is a prime.

It is a super-2 number, since 2×77744138119² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77744138419) 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 3 ways as a sum of consecutive naturals, for example, 3716877 + ... + 3737734.

It is an arithmetic number, because the mean of its divisors is an integer number (19437900790).

Almost surely, 2^77744138119 is an apocalyptic number.

77744138119 is a deficient number, since it is larger than the sum of its proper divisors (7465041).

77744138119 is a wasteful number, since it uses less digits than its factorization.

77744138119 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7465040.

The product of its digits is 1185408, while the sum is 52.

The spelling of 77744138119 in words is "seventy-seven billion, seven hundred forty-four million, one hundred thirty-eight thousand, one hundred nineteen".