194189414507 has 4 divisors (see below), whose sum is σ = 211842997656. Its totient is φ = 176535831360.

The previous prime is 194189414473. The next prime is 194189414543. The reversal of 194189414507 is 705414981491.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-194189414507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (194189419507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8826791558 + ... + 8826791579.

It is an arithmetic number, because the mean of its divisors is an integer number (52960749414).

Almost surely, 2^194189414507 is an apocalyptic number.

194189414507 is a deficient number, since it is larger than the sum of its proper divisors (17653583149).

194189414507 is a wasteful number, since it uses less digits than its factorization.

194189414507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17653583148.

The product of its (nonzero) digits is 1451520, while the sum is 53.

The spelling of 194189414507 in words is "one hundred ninety-four billion, one hundred eighty-nine million, four hundred fourteen thousand, five hundred seven".