988776665711 has 4 divisors (see below), whose sum is σ = 988786362312. Its totient is φ = 988766969112.

The previous prime is 988776665707. The next prime is 988776665719. The reversal of 988776665711 is 117566677889.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 117566677889 = 251 ⋅468393139.

It is a cyclic number.

It is not a de Polignac number, because 988776665711 - 2² = 988776665707 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 (988776665719) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4693700 + ... + 4899833.

It is an arithmetic number, because the mean of its divisors is an integer number (247196590578).

Almost surely, 2^988776665711 is an apocalyptic number.

988776665711 is a deficient number, since it is larger than the sum of its proper divisors (9696601).

988776665711 is a wasteful number, since it uses less digits than its factorization.

988776665711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9696600.

The product of its digits is 213373440, while the sum is 71.

The spelling of 988776665711 in words is "nine hundred eighty-eight billion, seven hundred seventy-six million, six hundred sixty-five thousand, seven hundred eleven".