194838725159078 has 32 divisors (see below), whose sum is σ = 392402467457280. Its totient is φ = 70071869187360.

The previous prime is 194838725159077. The next prime is 194838725159081. The reversal of 194838725159078 is 870951527838491.

It is a super-2 number, since 2×194838725159078² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (77).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194838725159077) by changing a digit.

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, 48661018268 + ... + 48661022271.

It is an arithmetic number, because the mean of its divisors is an integer number (12262577108040).

Almost surely, 2^{194838725159078} is an apocalyptic number.

194838725159078 is an abundant number, since it is smaller than the sum of its proper divisors (197563742298202).

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

194838725159078 is a wasteful number, since it uses less digits than its factorization.

194838725159078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97322040572.

The product of its (nonzero) digits is 1219276800, while the sum is 77.

The spelling of 194838725159078 in words is "one hundred ninety-four trillion, eight hundred thirty-eight billion, seven hundred twenty-five million, one hundred fifty-nine thousand, seventy-eight".