194882500691 has 4 divisors (see below), whose sum is σ = 197072191800. Its totient is φ = 192692809584.

The previous prime is 194882500679. The next prime is 194882500693. The reversal of 194882500691 is 196005288491.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 196005288491 = 197 ⋅994950703.

It is a cyclic number.

It is not a de Polignac number, because 194882500691 - 2⁶ = 194882500627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (194882500693) 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, 1094845421 + ... + 1094845598.

It is an arithmetic number, because the mean of its divisors is an integer number (49268047950).

Almost surely, 2^194882500691 is an apocalyptic number.

194882500691 is a deficient number, since it is larger than the sum of its proper divisors (2189691109).

194882500691 is an equidigital number, since it uses as much as digits as its factorization.

194882500691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2189691108.

The product of its (nonzero) digits is 1244160, while the sum is 53.

The spelling of 194882500691 in words is "one hundred ninety-four billion, eight hundred eighty-two million, five hundred thousand, six hundred ninety-one".