199471478240 has 96 divisors (see below), whose sum is σ = 481540308480. Its totient is φ = 78063731200.

The previous prime is 199471478237. The next prime is 199471478257. The reversal of 199471478240 is 42874174991.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1421141 + ... + 1555179.

It is an arithmetic number, because the mean of its divisors is an integer number (5016044880).

Almost surely, 2^199471478240 is an apocalyptic number.

199471478240 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 199471478240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (240770154240).

199471478240 is an abundant number, since it is smaller than the sum of its proper divisors (282068830240).

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

199471478240 is a wasteful number, since it uses less digits than its factorization.

199471478240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134256 (or 134248 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 56.

The spelling of 199471478240 in words is "one hundred ninety-nine billion, four hundred seventy-one million, four hundred seventy-eight thousand, two hundred forty".