16109558400 has 192 divisors, whose sum is σ = 57142905120. Its totient is φ = 3965399040.

The previous prime is 16109558393. The next prime is 16109558429. The reversal of 16109558400 is 485590161.

It is a tau number, because it is divible by the number of its divisors (192).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 60259 + ... + 189341.

Almost surely, 2^16109558400 is an apocalyptic number.

16109558400 is a gapful number since it is divisible by the number (10) 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 16109558400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28571452560).

16109558400 is an abundant number, since it is smaller than the sum of its proper divisors (41033346720).

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

16109558400 is a wasteful number, since it uses less digits than its factorization.

16109558400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129123 (or 129106 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 39.

The spelling of 16109558400 in words is "sixteen billion, one hundred nine million, five hundred fifty-eight thousand, four hundred".