194645205189040 has 80 divisors (see below), whose sum is σ = 457024934246400. Its totient is φ = 77088486940416.

The previous prime is 194645205189031. The next prime is 194645205189067. The reversal of 194645205189040 is 40981502546491.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×194645205189040² (a number of 29 digits) contains 22 as substring.

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, 44370841 + ... + 48559879.

It is an arithmetic number, because the mean of its divisors is an integer number (5712811678080).

Almost surely, 2^{194645205189040} is an apocalyptic number.

194645205189040 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 194645205189040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (228512467123200).

194645205189040 is an abundant number, since it is smaller than the sum of its proper divisors (262379729057360).

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

194645205189040 is a wasteful number, since it uses less digits than its factorization.

194645205189040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4194794 (or 4194788 counting only the distinct ones).

The product of its (nonzero) digits is 12441600, while the sum is 58.

The spelling of 194645205189040 in words is "one hundred ninety-four trillion, six hundred forty-five billion, two hundred five million, one hundred eighty-nine thousand, forty".