194733593681 has 8 divisors (see below), whose sum is σ = 212459415264. Its totient is φ = 177011566720.

The previous prime is 194733593653. The next prime is 194733593687. The reversal of 194733593681 is 186395337491.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 194733593681 - 2⁶ = 194733593617 is a prime.

It is a super-2 number, since 2×194733593681² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 194733593681.

It is not an unprimeable number, because it can be changed into a prime (194733593687) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 840815 + ... + 1047108.

It is an arithmetic number, because the mean of its divisors is an integer number (26557426908).

Almost surely, 2^194733593681 is an apocalyptic number.

194733593681 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

194733593681 is a deficient number, since it is larger than the sum of its proper divisors (17725821583).

194733593681 is a wasteful number, since it uses less digits than its factorization.

194733593681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1897311.

The product of its digits is 14696640, while the sum is 59.

The spelling of 194733593681 in words is "one hundred ninety-four billion, seven hundred thirty-three million, five hundred ninety-three thousand, six hundred eighty-one".