194797863381 has 16 divisors (see below), whose sum is σ = 286928962560. Its totient is φ = 116564887920.

The previous prime is 194797863373. The next prime is 194797863391. The reversal of 194797863381 is 183368797491.

It is not a de Polignac number, because 194797863381 - 2³ = 194797863373 is a prime.

It is a super-2 number, since 2×194797863381² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194797863391) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37357935 + ... + 37363148.

It is an arithmetic number, because the mean of its divisors is an integer number (17933060160).

Almost surely, 2^194797863381 is an apocalyptic number.

194797863381 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

194797863381 is a deficient number, since it is larger than the sum of its proper divisors (92131099179).

194797863381 is a wasteful number, since it uses less digits than its factorization.

194797863381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74721176.

The product of its digits is 54867456, while the sum is 66.

The spelling of 194797863381 in words is "one hundred ninety-four billion, seven hundred ninety-seven million, eight hundred sixty-three thousand, three hundred eighty-one".