77848669887 has 8 divisors (see below), whose sum is σ = 104805976704. Its totient is φ = 51395238168.

The previous prime is 77848669859. The next prime is 77848669907. The reversal of 77848669887 is 78896684877.

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

It is not a de Polignac number, because 77848669887 - 2¹⁸ = 77848407743 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77848669187) 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 7 ways as a sum of consecutive naturals, for example, 125968413 + ... + 125969030.

It is an arithmetic number, because the mean of its divisors is an integer number (13100747088).

Almost surely, 2^77848669887 is an apocalyptic number.

77848669887 is a deficient number, since it is larger than the sum of its proper divisors (26957306817).

77848669887 is a wasteful number, since it uses less digits than its factorization.

77848669887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251937549.

The product of its digits is 1820786688, while the sum is 78.

The spelling of 77848669887 in words is "seventy-seven billion, eight hundred forty-eight million, six hundred sixty-nine thousand, eight hundred eighty-seven".