77854044235607 has 2 divisors, whose sum is σ = 77854044235608. Its totient is φ = 77854044235606.

The previous prime is 77854044235573. The next prime is 77854044235619. The reversal of 77854044235607 is 70653244045877.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 77854044235607 - 2²⁶ = 77853977126743 is a prime.

It is a super-2 number, since 2×77854044235607² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 77854044235607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77854044235907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38927022117803 + 38927022117804.

It is an arithmetic number, because the mean of its divisors is an integer number (38927022117804).

Almost surely, 2^{77854044235607} is an apocalyptic number.

77854044235607 is a deficient number, since it is larger than the sum of its proper divisors (1).

77854044235607 is an equidigital number, since it uses as much as digits as its factorization.

77854044235607 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 158054400, while the sum is 62.

The spelling of 77854044235607 in words is "seventy-seven trillion, eight hundred fifty-four billion, forty-four million, two hundred thirty-five thousand, six hundred seven".