77854044235907 has 2 divisors, whose sum is σ = 77854044235908. Its totient is φ = 77854044235906.

The previous prime is 77854044235867. The next prime is 77854044235909. The reversal of 77854044235907 is 70953244045877.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 77854044235907 - 2⁶ = 77854044235843 is a prime.

It is a super-2 number, since 2×77854044235907² (a number of 29 digits) contains 22 as substring.

Together with 77854044235909, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (77854044235909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38927022117953 + 38927022117954.

It is an arithmetic number, because the mean of its divisors is an integer number (38927022117954).

Almost surely, 2^{77854044235907} is an apocalyptic number.

77854044235907 is a deficient number, since it is larger than the sum of its proper divisors (1).

77854044235907 is an equidigital number, since it uses as much as digits as its factorization.

77854044235907 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 237081600, while the sum is 65.

The spelling of 77854044235907 in words is "seventy-seven trillion, eight hundred fifty-four billion, forty-four million, two hundred thirty-five thousand, nine hundred seven".