194887117768 has 128 divisors (see below), whose sum is σ = 447367898880. Its totient is φ = 77690142720.

The previous prime is 194887117759. The next prime is 194887117783. The reversal of 194887117768 is 867711788491.

It is a hoax number, since the sum of its digits (67) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 109057371 + ... + 109059157.

It is an arithmetic number, because the mean of its divisors is an integer number (3495061710).

Almost surely, 2^194887117768 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 194887117768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (223683949440).

194887117768 is an abundant number, since it is smaller than the sum of its proper divisors (252480781112).

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

194887117768 is a wasteful number, since it uses less digits than its factorization.

194887117768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3095 (or 3091 counting only the distinct ones).

The product of its digits is 37933056, while the sum is 67.

The spelling of 194887117768 in words is "one hundred ninety-four billion, eight hundred eighty-seven million, one hundred seventeen thousand, seven hundred sixty-eight".