549779619840 has 480 divisors, whose sum is σ = 1960458522624. Its totient is φ = 130414018560.

The previous prime is 549779619673. The next prime is 549779619841. The reversal of 549779619840 is 48916977945.

It is a tau number, because it is divible by the number of its divisors (480).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (549779619841) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 127055757 + ... + 127060083.

Almost surely, 2^549779619840 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 549779619840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (980229261312).

549779619840 is an abundant number, since it is smaller than the sum of its proper divisors (1410678902784).

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

549779619840 is a wasteful number, since it uses less digits than its factorization.

549779619840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4421 (or 4395 counting only the distinct ones).

The product of its (nonzero) digits is 137168640, while the sum is 69.

The spelling of 549779619840 in words is "five hundred forty-nine billion, seven hundred seventy-nine million, six hundred nineteen thousand, eight hundred forty".