194046254640 has 1280 divisors, whose sum is σ = 839260569600. Its totient is φ = 40236134400.

The previous prime is 194046254561. The next prime is 194046254659. The reversal of 194046254640 is 46452640491.

194046254640 is a `hidden beast` number, since 1 + 9 + 4 + 0 + 4 + 62 + 546 + 40 = 666.

194046254640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (45).

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 255 ways as a sum of consecutive naturals, for example, 716037705 + ... + 716037975.

It is an arithmetic number, because the mean of its divisors is an integer number (655672320).

Almost surely, 2^194046254640 is an apocalyptic number.

194046254640 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 194046254640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (419630284800).

194046254640 is an abundant number, since it is smaller than the sum of its proper divisors (645214314960).

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

194046254640 is a wasteful number, since it uses less digits than its factorization.

194046254640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423 (or 411 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 45.

The spelling of 194046254640 in words is "one hundred ninety-four billion, forty-six million, two hundred fifty-four thousand, six hundred forty".