77857988975877 has 16 divisors (see below), whose sum is σ = 116308740290112. Its totient is φ = 45911344849920.

The previous prime is 77857988975867. The next prime is 77857988975909.

77857988975877 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 77857988975877 - 2⁷ = 77857988975749 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77857988975867) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31882877148 + ... + 31882879589.

It is an arithmetic number, because the mean of its divisors is an integer number (7269296268132).

Almost surely, 2^{77857988975877} is an apocalyptic number.

It is an amenable number.

77857988975877 is a deficient number, since it is larger than the sum of its proper divisors (38450751314235).

77857988975877 is a wasteful number, since it uses less digits than its factorization.

77857988975877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63765756788.

The product of its digits is 975827865600, while the sum is 102.

The spelling of 77857988975877 in words is "seventy-seven trillion, eight hundred fifty-seven billion, nine hundred eighty-eight million, nine hundred seventy-five thousand, eight hundred seventy-seven".