194317850513 has 8 divisors (see below), whose sum is σ = 198526734696. Its totient is φ = 190141977600.

The previous prime is 194317850501. The next prime is 194317850537. The reversal of 194317850513 is 315058713491.

It can be written as a sum of positive squares in 4 ways, for example, as 9857908369 + 184459942144 = 99287^2 + 429488^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 194317850513 - 2⁶ = 194317850449 is a prime.

It is a super-2 number, since 2×194317850513² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (194317850543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8240918 + ... + 8264463.

It is an arithmetic number, because the mean of its divisors is an integer number (24815841837).

Almost surely, 2^194317850513 is an apocalyptic number.

It is an amenable number.

194317850513 is a deficient number, since it is larger than the sum of its proper divisors (4208884183).

194317850513 is a wasteful number, since it uses less digits than its factorization.

194317850513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16505635.

The product of its (nonzero) digits is 453600, while the sum is 47.

The spelling of 194317850513 in words is "one hundred ninety-four billion, three hundred seventeen million, eight hundred fifty thousand, five hundred thirteen".