77887278877 has 24 divisors (see below), whose sum is σ = 81749956320. Its totient is φ = 74195028000.

The previous prime is 77887278841. The next prime is 77887278901.

77887278877 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 77887278877 - 2¹⁵ = 77887246109 is a prime.

It is a super-3 number, since 3×77887278877³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77887278277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17371678 + ... + 17376160.

It is an arithmetic number, because the mean of its divisors is an integer number (3406248180).

Almost surely, 2^77887278877 is an apocalyptic number.

It is an amenable number.

77887278877 is a deficient number, since it is larger than the sum of its proper divisors (3862677443).

77887278877 is a wasteful number, since it uses less digits than its factorization.

77887278877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4825 (or 4794 counting only the distinct ones).

The product of its digits is 963780608, while the sum is 76.

The spelling of 77887278877 in words is "seventy-seven billion, eight hundred eighty-seven million, two hundred seventy-eight thousand, eight hundred seventy-seven".