77846864877 has 48 divisors (see below), whose sum is σ = 120604543488. Its totient is φ = 48260171520.

The previous prime is 77846864827. The next prime is 77846864881.

77846864877 is a `hidden beast` number, since 7 + 7 + 84 + 68 + 6 + 487 + 7 = 666.

77846864877 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 77846864877 - 2⁷ = 77846864749 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77846864807) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11339548 + ... + 11346410.

It is an arithmetic number, because the mean of its divisors is an integer number (2512594656).

Almost surely, 2^77846864877 is an apocalyptic number.

It is an amenable number.

77846864877 is a deficient number, since it is larger than the sum of its proper divisors (42757678611).

77846864877 is a wasteful number, since it uses less digits than its factorization.

77846864877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8410 (or 8407 counting only the distinct ones).

The product of its digits is 708083712, while the sum is 72.

The spelling of 77846864877 in words is "seventy-seven billion, eight hundred forty-six million, eight hundred sixty-four thousand, eight hundred seventy-seven".