77789881486869 has 8 divisors (see below), whose sum is σ = 103725146609472. Its totient is φ = 51857268677760.

The previous prime is 77789881486853. The next prime is 77789881486871. The reversal of 77789881486869 is 96868418898777.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 77789881486869 - 2⁴ = 77789881486853 is a prime.

It is a super-2 number, since 2×77789881486869² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77789881486169) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 663009937 + ... + 663127254.

It is an arithmetic number, because the mean of its divisors is an integer number (12965643326184).

Almost surely, 2^{77789881486869} is an apocalyptic number.

It is an amenable number.

77789881486869 is a deficient number, since it is larger than the sum of its proper divisors (25935265122603).

77789881486869 is a wasteful number, since it uses less digits than its factorization.

77789881486869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1326156747.

The product of its digits is 131096641536, while the sum is 96.

The spelling of 77789881486869 in words is "seventy-seven trillion, seven hundred eighty-nine billion, eight hundred eighty-one million, four hundred eighty-six thousand, eight hundred sixty-nine".