239621545521796 has 81 divisors (see below), whose sum is σ = 431912947752741. Its totient is φ = 116320762881600.

The previous prime is 239621545521793. The next prime is 239621545521803. The reversal of 239621545521796 is 697125545126932.

It is a happy number.

The square root of 239621545521796 is 15479714.

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., 11546308856196 + 228075236665600 = 3397986^2 + 15102160^2 .

It is a super-2 number, since 2×239621545521796² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (239621545521793) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 394763666125 + ... + 394763666731.

Almost surely, 2^{239621545521796} is an apocalyptic number.

239621545521796 is the 15479714-th square number.

It is an amenable number.

239621545521796 is a deficient number, since it is larger than the sum of its proper divisors (192291402230945).

239621545521796 is an frugal number, since it uses more digits than its factorization.

239621545521796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1922 (or 961 counting only the distinct ones).

The product of its digits is 244944000, while the sum is 67.

The spelling of 239621545521796 in words is "two hundred thirty-nine trillion, six hundred twenty-one billion, five hundred forty-five million, five hundred twenty-one thousand, seven hundred ninety-six".