16523086878 has 24 divisors (see below), whose sum is σ = 35926534488. Its totient is φ = 5488232112.

The previous prime is 16523086871. The next prime is 16523086891. The reversal of 16523086878 is 87868032561.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16523086871) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1616725 + ... + 1626912.

It is an arithmetic number, because the mean of its divisors is an integer number (1496938937).

Almost surely, 2^16523086878 is an apocalyptic number.

16523086878 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

16523086878 is an abundant number, since it is smaller than the sum of its proper divisors (19403447610).

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

16523086878 is a wasteful number, since it uses less digits than its factorization.

16523086878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3243928 (or 3243925 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 54.

The spelling of 16523086878 in words is "sixteen billion, five hundred twenty-three million, eighty-six thousand, eight hundred seventy-eight".