199405585400 has 96 divisors (see below), whose sum is σ = 529937927040. Its totient is φ = 68356172160.

The previous prime is 199405585387. The next prime is 199405585417. The reversal of 199405585400 is 4585504991.

It is a Harshad number since it is a multiple of its sum of digits (50).

It is a congruent number.

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, 16551779 + ... + 16563821.

It is an arithmetic number, because the mean of its divisors is an integer number (5520186740).

Almost surely, 2^199405585400 is an apocalyptic number.

199405585400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

199405585400 is an abundant number, since it is smaller than the sum of its proper divisors (330532341640).

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

199405585400 is a wasteful number, since it uses less digits than its factorization.

199405585400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23893 (or 23884 counting only the distinct ones).

The product of its (nonzero) digits is 1296000, while the sum is 50.

The spelling of 199405585400 in words is "one hundred ninety-nine billion, four hundred five million, five hundred eighty-five thousand, four hundred".