939557998864 has 45 divisors (see below), whose sum is σ = 1881250929381. Its totient is φ = 454566679680.

The previous prime is 939557998831. The next prime is 939557998891. The reversal of 939557998864 is 468899755939.

The square root of 939557998864 is 969308.

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

It can be written as a sum of positive squares in only one way, i.e., 2162250000 + 937395748864 = 46500^2 + 968192^2 .

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, 120190284 + ... + 120198100.

Almost surely, 2^939557998864 is an apocalyptic number.

939557998864 is the 969308-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 939557998864

939557998864 is an abundant number, since it is smaller than the sum of its proper divisors (941692930517).

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

939557998864 is an frugal number, since it uses more digits than its factorization.

939557998864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15704 (or 7850 counting only the distinct ones).

The product of its digits is 5290790400, while the sum is 82.

The spelling of 939557998864 in words is "nine hundred thirty-nine billion, five hundred fifty-seven million, nine hundred ninety-eight thousand, eight hundred sixty-four".