877997686799778 has 64 divisors (see below), whose sum is σ = 1766825746053120. Its totient is φ = 290865742026048.

The previous prime is 877997686799713. The next prime is 877997686799797.

877997686799778 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×877997686799778² (a number of 31 digits) contains 22 as substring.

It is an unprimeable number.

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 in 31 ways as a sum of consecutive naturals, for example, 17251810500 + ... + 17251861392.

It is an arithmetic number, because the mean of its divisors is an integer number (27606652282080).

Almost surely, 2^{877997686799778} is an apocalyptic number.

877997686799778 is an abundant number, since it is smaller than the sum of its proper divisors (888828059253342).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

877997686799778 is a wasteful number, since it uses less digits than its factorization.

877997686799778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74663.

The product of its digits is 14227570280448, while the sum is 114.

The spelling of 877997686799778 in words is "eight hundred seventy-seven trillion, nine hundred ninety-seven billion, six hundred eighty-six million, seven hundred ninety-nine thousand, seven hundred seventy-eight".