5490041778 has 144 divisors (see below), whose sum is σ = 13919455368. Its totient is φ = 1549209600.

The previous prime is 5490041771. The next prime is 5490041779. The reversal of 5490041778 is 8771400945.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 599417289 + 4890624489 = 24483^2 + 69933^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5490041771) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 6686608 + ... + 6687428.

Almost surely, 2^5490041778 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5490041778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6959727684).

5490041778 is an abundant number, since it is smaller than the sum of its proper divisors (8429413590).

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

5490041778 is a wasteful number, since it uses less digits than its factorization.

5490041778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 941 (or 897 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 45.

The square root of 5490041778 is about 74094.8161344638. The cubic root of 5490041778 is about 1764.1081909516.

The spelling of 5490041778 in words is "five billion, four hundred ninety million, forty-one thousand, seven hundred seventy-eight".