194987663424 has 168 divisors, whose sum is σ = 580681742368. Its totient is φ = 64874234880.

The previous prime is 194987663407. The next prime is 194987663461. The reversal of 194987663424 is 424366789491.

It is a happy number.

194987663424 is a `hidden beast` number, since 19 + 498 + 76 + 63 + 4 + 2 + 4 = 666.

It is a super-2 number, since 2×194987663424² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8495484 + ... + 8518404.

Almost surely, 2^194987663424 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 194987663424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (290340871184).

194987663424 is an abundant number, since it is smaller than the sum of its proper divisors (385694078944).

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

194987663424 is an equidigital number, since it uses as much as digits as its factorization.

194987663424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23495 (or 23473 counting only the distinct ones).

The product of its digits is 62705664, while the sum is 63.

The spelling of 194987663424 in words is "one hundred ninety-four billion, nine hundred eighty-seven million, six hundred sixty-three thousand, four hundred twenty-four".