5481891720544 has 24 divisors (see below), whose sum is σ = 10794493078488. Its totient is φ = 2740433160960.

The previous prime is 5481891720457. The next prime is 5481891720593. The reversal of 5481891720544 is 4450271981845.

It is a happy number.

It is a super-2 number, since 2×5481891720544² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15848077 + ... + 16190284.

It is an arithmetic number, because the mean of its divisors is an integer number (449770544937).

Almost surely, 2^{5481891720544} is an apocalyptic number.

It is an amenable number.

5481891720544 is a deficient number, since it is larger than the sum of its proper divisors (5312601357944).

5481891720544 is a wasteful number, since it uses less digits than its factorization.

5481891720544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32043718 (or 32043710 counting only the distinct ones).

The product of its (nonzero) digits is 12902400, while the sum is 58.

The spelling of 5481891720544 in words is "five trillion, four hundred eighty-one billion, eight hundred ninety-one million, seven hundred twenty thousand, five hundred forty-four".