194851691272 has 48 divisors (see below), whose sum is σ = 443473479360. Its totient is φ = 79877087136.

The previous prime is 194851691257. The next prime is 194851691317. The reversal of 194851691272 is 272196158491.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10796868 + ... + 10814899.

It is an arithmetic number, because the mean of its divisors is an integer number (9239030820).

Almost surely, 2^194851691272 is an apocalyptic number.

It is an amenable number.

194851691272 is an abundant number, since it is smaller than the sum of its proper divisors (248621788088).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

194851691272 is a wasteful number, since it uses less digits than its factorization.

194851691272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21611810 (or 21611799 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 55.

The spelling of 194851691272 in words is "one hundred ninety-four billion, eight hundred fifty-one million, six hundred ninety-one thousand, two hundred seventy-two".