198478741646 has 8 divisors (see below), whose sum is σ = 297722099784. Its totient is φ = 99238041720.

The previous prime is 198478741619. The next prime is 198478741651. The reversal of 198478741646 is 646147874891.

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

It is a super-2 number, since 2×198478741646² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 466025 + ... + 783668.

It is an arithmetic number, because the mean of its divisors is an integer number (37215262473).

Almost surely, 2^198478741646 is an apocalyptic number.

198478741646 is a deficient number, since it is larger than the sum of its proper divisors (99243358138).

198478741646 is a wasteful number, since it uses less digits than its factorization.

198478741646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1329106.

The product of its digits is 65028096, while the sum is 65.

The spelling of 198478741646 in words is "one hundred ninety-eight billion, four hundred seventy-eight million, seven hundred forty-one thousand, six hundred forty-six".