4354778198988 has 192 divisors, whose sum is σ = 13153063633920. Its totient is φ = 1220137012224.

The previous prime is 4354778198863. The next prime is 4354778199017. The reversal of 4354778198988 is 8898918774534.

4354778198988 is a `hidden beast` number, since 4 + 354 + 7 + 78 + 198 + 9 + 8 + 8 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 83435556 + ... + 83487732.

It is an arithmetic number, because the mean of its divisors is an integer number (68505539760).

Almost surely, 2^{4354778198988} 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 4354778198988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6576531816960).

4354778198988 is an abundant number, since it is smaller than the sum of its proper divisors (8798285434932).

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

4354778198988 is a wasteful number, since it uses less digits than its factorization.

4354778198988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54333 (or 54325 counting only the distinct ones).

The product of its digits is 3901685760, while the sum is 81.

The spelling of 4354778198988 in words is "four trillion, three hundred fifty-four billion, seven hundred seventy-eight million, one hundred ninety-eight thousand, nine hundred eighty-eight".