194951342555838 has 96 divisors (see below), whose sum is σ = 464218828894080. Its totient is φ = 58637889161280.

The previous prime is 194951342555833. The next prime is 194951342555861. The reversal of 194951342555838 is 838555243159491.

It is a happy number.

194951342555838 is a `hidden beast` number, since 1 + 9 + 4 + 9 + 5 + 1 + 34 + 2 + 5 + 5 + 583 + 8 = 666.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194951342555833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 26127273 + ... + 32749611.

It is an arithmetic number, because the mean of its divisors is an integer number (4835612800980).

Almost surely, 2^{194951342555838} is an apocalyptic number.

194951342555838 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 194951342555838, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (232109414447040).

194951342555838 is an abundant number, since it is smaller than the sum of its proper divisors (269267486338242).

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

194951342555838 is a wasteful number, since it uses less digits than its factorization.

194951342555838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6623462 (or 6623459 counting only the distinct ones).

The product of its digits is 933120000, while the sum is 72.

The spelling of 194951342555838 in words is "one hundred ninety-four trillion, nine hundred fifty-one billion, three hundred forty-two million, five hundred fifty-five thousand, eight hundred thirty-eight".