16385368428 has 432 divisors, whose sum is σ = 52472798560. Its totient is φ = 4269957120.

The previous prime is 16385368399. The next prime is 16385368469. The reversal of 16385368428 is 82486358361.

16385368428 is a `hidden beast` number, since 1 + 6 + 3 + 8 + 536 + 84 + 28 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 104365326 + ... + 104365482.

Almost surely, 2^16385368428 is an apocalyptic number.

16385368428 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16385368428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26236399280).

16385368428 is an abundant number, since it is smaller than the sum of its proper divisors (36087430132).

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

16385368428 is a wasteful number, since it uses less digits than its factorization.

16385368428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318 (or 302 counting only the distinct ones).

The product of its digits is 6635520, while the sum is 54.

The spelling of 16385368428 in words is "sixteen billion, three hundred eighty-five million, three hundred sixty-eight thousand, four hundred twenty-eight".