194891616 has 48 divisors (see below), whose sum is σ = 568436400. Its totient is φ = 64963584.

The previous prime is 194891611. The next prime is 194891633. The reversal of 194891616 is 616198491.

194891616 is a `hidden beast` number, since 1 + 9 + 489 + 161 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (48).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194891611) 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, 111921 + ... + 113648.

It is an arithmetic number, because the mean of its divisors is an integer number (11842425).

Almost surely, 2^194891616 is an apocalyptic number.

194891616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

194891616 is an abundant number, since it is smaller than the sum of its proper divisors (373544784).

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

194891616 is a wasteful number, since it uses less digits than its factorization.

194891616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225588 (or 225574 counting only the distinct ones).

The product of its digits is 93312, while the sum is 45.

The square root of 194891616 is about 13960.3587346458. The cubic root of 194891616 is about 579.7815427779.

The spelling of 194891616 in words is "one hundred ninety-four million, eight hundred ninety-one thousand, six hundred sixteen".