4391631566884 has 27 divisors (see below), whose sum is σ = 8034205558897. Its totient is φ = 2100299428304.

The previous prime is 4391631566879. The next prime is 4391631566929. The reversal of 4391631566884 is 4886651361934.

The square root of 4391631566884 is 2095622.

It is a perfect power (a square), and thus also a powerful number.

4391631566884 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 1868388272100 + 2523243294784 = 1366890^2 + 1588472^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 96375834 + ... + 96421390.

Almost surely, 2^{4391631566884} is an apocalyptic number.

4391631566884 is the 2095622-nd square number.

It is an amenable number.

4391631566884 is a deficient number, since it is larger than the sum of its proper divisors (3642573992013).

4391631566884 is an frugal number, since it uses more digits than its factorization.

4391631566884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91164 (or 45582 counting only the distinct ones).

The product of its digits is 89579520, while the sum is 64.

Multiplying 4391631566884 by its sum of digits (64), we get a square (281064420280576 = 16764976²).

The spelling of 4391631566884 in words is "four trillion, three hundred ninety-one billion, six hundred thirty-one million, five hundred sixty-six thousand, eight hundred eighty-four".