194039724640 has 96 divisors (see below), whose sum is σ = 471355536960. Its totient is φ = 75452442624.

The previous prime is 194039724589. The next prime is 194039724661. The reversal of 194039724640 is 46427930491.

194039724640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 819357 + ... + 1029283.

It is an arithmetic number, because the mean of its divisors is an integer number (4909953510).

Almost surely, 2^194039724640 is an apocalyptic number.

194039724640 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 194039724640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (235677768480).

194039724640 is an abundant number, since it is smaller than the sum of its proper divisors (277315812320).

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

194039724640 is a wasteful number, since it uses less digits than its factorization.

194039724640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210104 (or 210096 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 49.

The spelling of 194039724640 in words is "one hundred ninety-four billion, thirty-nine million, seven hundred twenty-four thousand, six hundred forty".