194494400887 has 4 divisors (see below), whose sum is σ = 205935248016. Its totient is φ = 183053553760.

The previous prime is 194494400879. The next prime is 194494400897. The reversal of 194494400887 is 788004494491.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 788004494491 = 11971 ⋅65826121.

It is a cyclic number.

It is not a de Polignac number, because 194494400887 - 2³ = 194494400879 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 (194494400897) 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, 5720423539 + ... + 5720423572.

It is an arithmetic number, because the mean of its divisors is an integer number (51483812004).

Almost surely, 2^194494400887 is an apocalyptic number.

194494400887 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

194494400887 is a deficient number, since it is larger than the sum of its proper divisors (11440847129).

194494400887 is a wasteful number, since it uses less digits than its factorization.

194494400887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11440847128.

The product of its (nonzero) digits is 9289728, while the sum is 58.

The spelling of 194494400887 in words is "one hundred ninety-four billion, four hundred ninety-four million, four hundred thousand, eight hundred eighty-seven".