194323695551 has 4 divisors (see below), whose sum is σ = 194332475400. Its totient is φ = 194314915704.

The previous prime is 194323695539. The next prime is 194323695611. The reversal of 194323695551 is 155596323491.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 194323695551 - 2¹⁰ = 194323694527 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 194323695493 and 194323695502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194313695551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4356641 + ... + 4401018.

It is an arithmetic number, because the mean of its divisors is an integer number (48583118850).

Almost surely, 2^194323695551 is an apocalyptic number.

194323695551 is a deficient number, since it is larger than the sum of its proper divisors (8779849).

194323695551 is an equidigital number, since it uses as much as digits as its factorization.

194323695551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8779848.

The product of its digits is 4374000, while the sum is 53.

The spelling of 194323695551 in words is "one hundred ninety-four billion, three hundred twenty-three million, six hundred ninety-five thousand, five hundred fifty-one".