193971639040 has 144 divisors (see below), whose sum is σ = 467618961600. Its totient is φ = 77090144256.

The previous prime is 193971639019. The next prime is 193971639073. The reversal of 193971639040 is 40936179391.

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, 211067701 + ... + 211068619.

It is an arithmetic number, because the mean of its divisors is an integer number (3247353900).

Almost surely, 2^193971639040 is an apocalyptic number.

193971639040 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 193971639040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (233809480800).

193971639040 is an abundant number, since it is smaller than the sum of its proper divisors (273647322560).

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

193971639040 is an equidigital number, since it uses as much as digits as its factorization.

193971639040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1822 (or 1808 counting only the distinct ones).

The product of its (nonzero) digits is 1102248, while the sum is 52.

The spelling of 193971639040 in words is "one hundred ninety-three billion, nine hundred seventy-one million, six hundred thirty-nine thousand, forty".