8138779911528 has 64 divisors (see below), whose sum is σ = 23255250879360. Its totient is φ = 2325206290176.

The previous prime is 8138779911523. The next prime is 8138779911529. The reversal of 8138779911528 is 8251199778318.

It is not an unprimeable number, because it can be changed into a prime (8138779911523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 808626 + ... + 4114782.

It is an arithmetic number, because the mean of its divisors is an integer number (363363294990).

Almost surely, 2^{8138779911528} is an apocalyptic number.

It is an amenable number.

8138779911528 is an abundant number, since it is smaller than the sum of its proper divisors (15116470967832).

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

8138779911528 is a wasteful number, since it uses less digits than its factorization.

8138779911528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3320826 (or 3320822 counting only the distinct ones).

The product of its digits is 60963840, while the sum is 69.

The spelling of 8138779911528 in words is "eight trillion, one hundred thirty-eight billion, seven hundred seventy-nine million, nine hundred eleven thousand, five hundred twenty-eight".