18779656853928 has 128 divisors (see below), whose sum is σ = 51703507353600. Its totient is φ = 5657761587456.

The previous prime is 18779656853927. The next prime is 18779656853929. The reversal of 18779656853928 is 82935865697781.

It is an interprime number because it is at equal distance from previous prime (18779656853927) and next prime (18779656853929).

It is not an unprimeable number, because it can be changed into a prime (18779656853927) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1679326 + ... + 6354482.

It is an arithmetic number, because the mean of its divisors is an integer number (403933651200).

Almost surely, 2^{18779656853928} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18779656853928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25851753676800).

18779656853928 is an abundant number, since it is smaller than the sum of its proper divisors (32923850499672).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18779656853928 is a wasteful number, since it uses less digits than its factorization.

18779656853928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4675591 (or 4675587 counting only the distinct ones).

The product of its digits is 10973491200, while the sum is 84.

The spelling of 18779656853928 in words is "eighteen trillion, seven hundred seventy-nine billion, six hundred fifty-six million, eight hundred fifty-three thousand, nine hundred twenty-eight".