77744138107 has 2 divisors, whose sum is σ = 77744138108. Its totient is φ = 77744138106.

The previous prime is 77744138033. The next prime is 77744138177. The reversal of 77744138107 is 70183144777.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 77744138107 - 2¹¹ = 77744136059 is a prime.

It is a super-3 number, since 3×77744138107³ (a number of 34 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (77744138177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38872069053 + 38872069054.

It is an arithmetic number, because the mean of its divisors is an integer number (38872069054).

Almost surely, 2^77744138107 is an apocalyptic number.

77744138107 is a deficient number, since it is larger than the sum of its proper divisors (1).

77744138107 is an equidigital number, since it uses as much as digits as its factorization.

77744138107 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 921984, while the sum is 49.

The spelling of 77744138107 in words is "seventy-seven billion, seven hundred forty-four million, one hundred thirty-eight thousand, one hundred seven".