77872999927877 has 16 divisors (see below), whose sum is σ = 99154126467072. Its totient is φ = 59389190326320.

The previous prime is 77872999927873. The next prime is 77872999927927.

77872999927877 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 77872999927877 - 2² = 77872999927873 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77872999927873) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 10758907673 + ... + 10758914910.

It is an arithmetic number, because the mean of its divisors is an integer number (6197132904192).

Almost surely, 2^{77872999927877} is an apocalyptic number.

77872999927877 is a gapful number since it is divisible by the number (77) formed by its first and last digit.

It is an amenable number.

77872999927877 is a deficient number, since it is larger than the sum of its proper divisors (21281126539195).

77872999927877 is a wasteful number, since it uses less digits than its factorization.

77872999927877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21517822648.

The product of its digits is 197605142784, while the sum is 98.

The spelling of 77872999927877 in words is "seventy-seven trillion, eight hundred seventy-two billion, nine hundred ninety-nine million, nine hundred twenty-seven thousand, eight hundred seventy-seven".