3981321124880 has 40 divisors (see below), whose sum is σ = 10098078128064. Its totient is φ = 1447753136000.

The previous prime is 3981321124861. The next prime is 3981321124969. The reversal of 3981321124880 is 884211231893.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2262113396 + ... + 2262115155.

Almost surely, 2^{3981321124880} is an apocalyptic number.

It is an amenable number.

3981321124880 is an abundant number, since it is smaller than the sum of its proper divisors (6116757003184).

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

3981321124880 is a wasteful number, since it uses less digits than its factorization.

3981321124880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4524228575 (or 4524228569 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 50.

The spelling of 3981321124880 in words is "three trillion, nine hundred eighty-one billion, three hundred twenty-one million, one hundred twenty-four thousand, eight hundred eighty".