549778199040 has 640 divisors, whose sum is σ = 2269783296000. Its totient is φ = 123527282688.

The previous prime is 549778199029. The next prime is 549778199041. The reversal of 549778199040 is 40991877945.

549778199040 is a `hidden beast` number, since 5 + 497 + 7 + 8 + 19 + 90 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (640).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (549778199041) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 28536931 + ... + 28556189.

It is an arithmetic number, because the mean of its divisors is an integer number (3546536400).

Almost surely, 2^549778199040 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 549778199040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1134891648000).

549778199040 is an abundant number, since it is smaller than the sum of its proper divisors (1720005096960).

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

549778199040 is a wasteful number, since it uses less digits than its factorization.

549778199040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19357 (or 19335 counting only the distinct ones).

The product of its (nonzero) digits is 22861440, while the sum is 63.

The spelling of 549778199040 in words is "five hundred forty-nine billion, seven hundred seventy-eight million, one hundred ninety-nine thousand, forty".