5491878986880 has 1024 divisors, whose sum is σ = 23065494681600. Its totient is φ = 1217407795200.

The previous prime is 5491878986861. The next prime is 5491878986941. The reversal of 5491878986880 is 886898781945.

5491878986880 is a `hidden beast` number, since 549 + 1 + 8 + 7 + 8 + 9 + 8 + 68 + 8 + 0 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 5491878986880.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 264390895 + ... + 264411665.

It is an arithmetic number, because the mean of its divisors is an integer number (22524897150).

Almost surely, 2^{5491878986880} 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 5491878986880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11532747340800).

5491878986880 is an abundant number, since it is smaller than the sum of its proper divisors (17573615694720).

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

5491878986880 is a wasteful number, since it uses less digits than its factorization.

5491878986880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20930 (or 20912 counting only the distinct ones).

The product of its (nonzero) digits is 2229534720, while the sum is 81.

The spelling of 5491878986880 in words is "five trillion, four hundred ninety-one billion, eight hundred seventy-eight million, nine hundred eighty-six thousand, eight hundred eighty".