194938998517 has 8 divisors (see below), whose sum is σ = 195359570496. Its totient is φ = 194518881312.

The previous prime is 194938998503. The next prime is 194938998533. The reversal of 194938998517 is 715899839491.

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

It is a cyclic number.

It is not a de Polignac number, because 194938998517 - 2²⁷ = 194804780789 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 194938998517.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194938998577) 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, 751608 + ... + 977134.

It is an arithmetic number, because the mean of its divisors is an integer number (24419946312).

Almost surely, 2^194938998517 is an apocalyptic number.

It is an amenable number.

194938998517 is a deficient number, since it is larger than the sum of its proper divisors (420571979).

194938998517 is an equidigital number, since it uses as much as digits as its factorization.

194938998517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227387.

The product of its digits is 176359680, while the sum is 73.

The spelling of 194938998517 in words is "one hundred ninety-four billion, nine hundred thirty-eight million, nine hundred ninety-eight thousand, five hundred seventeen".