194728745442 has 128 divisors (see below), whose sum is σ = 503098656768. Its totient is φ = 48775910400.

The previous prime is 194728745437. The next prime is 194728745467. The reversal of 194728745442 is 244547827491.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1881217 + ... + 1982027.

It is an arithmetic number, because the mean of its divisors is an integer number (3930458256).

Almost surely, 2^194728745442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 194728745442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (251549328384).

194728745442 is an abundant number, since it is smaller than the sum of its proper divisors (308369911326).

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

194728745442 is a wasteful number, since it uses less digits than its factorization.

194728745442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100984.

The product of its digits is 18063360, while the sum is 57.

The spelling of 194728745442 in words is "one hundred ninety-four billion, seven hundred twenty-eight million, seven hundred forty-five thousand, four hundred forty-two".