194336491013 has 10 divisors (see below), whose sum is σ = 226712419014. Its totient is φ = 166574133096.

The previous prime is 194336491001. The next prime is 194336491121. The reversal of 194336491013 is 310194633491.

It can be written as a sum of positive squares in only one way, i.e., 159793666564 + 34542824449 = 399742^2 + 185857^2 .

It is not a de Polignac number, because 194336491013 - 2¹² = 194336486917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194336491213) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 40467506 + ... + 40472307.

Almost surely, 2^194336491013 is an apocalyptic number.

It is an amenable number.

194336491013 is a deficient number, since it is larger than the sum of its proper divisors (32375928001).

194336491013 is an frugal number, since it uses more digits than its factorization.

194336491013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80939841 (or 80939820 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 44.

The spelling of 194336491013 in words is "one hundred ninety-four billion, three hundred thirty-six million, four hundred ninety-one thousand, thirteen".