4521981347556 has 12 divisors (see below), whose sum is σ = 10551289810992. Its totient is φ = 1507327115848.

The previous prime is 4521981347509. The next prime is 4521981347563. The reversal of 4521981347556 is 6557431891254.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 4521981347556.

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, 188415889470 + ... + 188415889493.

It is an arithmetic number, because the mean of its divisors is an integer number (879274150916).

Almost surely, 2^{4521981347556} is an apocalyptic number.

It is an amenable number.

4521981347556 is an abundant number, since it is smaller than the sum of its proper divisors (6029308463436).

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

4521981347556 is a wasteful number, since it uses less digits than its factorization.

4521981347556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376831778970 (or 376831778968 counting only the distinct ones).

The product of its digits is 36288000, while the sum is 60.

The spelling of 4521981347556 in words is "four trillion, five hundred twenty-one billion, nine hundred eighty-one million, three hundred forty-seven thousand, five hundred fifty-six".