194745727440 has 600 divisors, whose sum is σ = 762708174624. Its totient is φ = 45672076800.

The previous prime is 194745727417. The next prime is 194745727447. The reversal of 194745727440 is 44727547491.

194745727440 is a `hidden beast` number, since 1 + 94 + 7 + 45 + 72 + 7 + 440 = 666.

It is a super-2 number, since 2×194745727440² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194745727447) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 68498659 + ... + 68501501.

Almost surely, 2^194745727440 is an apocalyptic number.

194745727440 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 194745727440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (381354087312).

194745727440 is an abundant number, since it is smaller than the sum of its proper divisors (567962447184).

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

194745727440 is a wasteful number, since it uses less digits than its factorization.

194745727440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2941 (or 2895 counting only the distinct ones).

The product of its (nonzero) digits is 7902720, while the sum is 54.

The spelling of 194745727440 in words is "one hundred ninety-four billion, seven hundred forty-five million, seven hundred twenty-seven thousand, four hundred forty".