549755813880 has 2048 divisors, whose sum is σ = 2494356480000. Its totient is φ = 104485552128.

The previous prime is 549755813869. The next prime is 549755813881. The reversal of 549755813880 is 88318557945.

549755813880 is a `hidden beast` number, since 5 + 49 + 7 + 5 + 581 + 3 + 8 + 8 + 0 = 666.

It is a super-2 number, since 2×549755813880² (a number of 24 digits) contains 22 as substring.

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

It is a nialpdrome in base 2 and base 8.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (549755813881) by changing a digit.

It is a polite number, since it can be written in 511 ways as a sum of consecutive naturals, for example, 5043631266 + ... + 5043631374.

It is an arithmetic number, because the mean of its divisors is an integer number (1217947500).

Almost surely, 2^549755813880 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 549755813880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1247178240000).

549755813880 is an abundant number, since it is smaller than the sum of its proper divisors (1944600666120).

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

549755813880 is a wasteful number, since it uses less digits than its factorization.

549755813880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278 (or 268 counting only the distinct ones).

The product of its (nonzero) digits is 48384000, while the sum is 63.

The spelling of 549755813880 in words is "five hundred forty-nine billion, seven hundred fifty-five million, eight hundred thirteen thousand, eight hundred eighty".