38539971856 has 45 divisors (see below), whose sum is σ = 79349481669. Its totient is φ = 18130175232.

The previous prime is 38539971853. The next prime is 38539971923. The reversal of 38539971856 is 65817993583.

The square root of 38539971856 is 196316.

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., 30005168400 + 8534803456 = 173220^2 + 92384^2 .

It is a super-2 number, since 2×38539971856² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38539971853) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 13348045 + ... + 13350931.

Almost surely, 2^38539971856 is an apocalyptic number.

38539971856 is the 196316-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 38539971856

38539971856 is an abundant number, since it is smaller than the sum of its proper divisors (40809509813).

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

38539971856 is an frugal number, since it uses more digits than its factorization.

38539971856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5816 (or 2906 counting only the distinct ones).

The product of its digits is 48988800, while the sum is 64.

Multiplying 38539971856 by its sum of digits (64), we get a square (2466558198784 = 1570528²).

The spelling of 38539971856 in words is "thirty-eight billion, five hundred thirty-nine million, nine hundred seventy-one thousand, eight hundred fifty-six".