194929016851 has 2 divisors, whose sum is σ = 194929016852. Its totient is φ = 194929016850.

The previous prime is 194929016797. The next prime is 194929016861. The reversal of 194929016851 is 158610929491.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 194929016851 - 2²⁷ = 194794799123 is a prime.

It is a super-2 number, since 2×194929016851² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 194929016792 and 194929016801.

It is not a weakly prime, because it can be changed into another prime (194929016861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97464508425 + 97464508426.

It is an arithmetic number, because the mean of its divisors is an integer number (97464508426).

Almost surely, 2^194929016851 is an apocalyptic number.

194929016851 is a deficient number, since it is larger than the sum of its proper divisors (1).

194929016851 is an equidigital number, since it uses as much as digits as its factorization.

194929016851 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1399680, while the sum is 55.

The spelling of 194929016851 in words is "one hundred ninety-four billion, nine hundred twenty-nine million, sixteen thousand, eight hundred fifty-one".