19556241995536 has 45 divisors (see below), whose sum is σ = 40250782222591. Its totient is φ = 9202795897856.

The previous prime is 19556241995497. The next prime is 19556241995581. The reversal of 19556241995536 is 63559914265591.

It is a happy number.

The square root of 19556241995536 is 4422244.

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

It can be written as a sum of positive squares in 4 ways, for example, as 10633834033936 + 8922407961600 = 3260956^2 + 2987040^2 .

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, 300680076 + ... + 300745108.

Almost surely, 2^{19556241995536} is an apocalyptic number.

19556241995536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

19556241995536 is the 4422244-th square number.

It is an amenable number.

19556241995536 is an abundant number, since it is smaller than the sum of its proper divisors (20694540227055).

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

19556241995536 is an frugal number, since it uses more digits than its factorization.

19556241995536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130108 (or 65052 counting only the distinct ones).

The product of its digits is 393660000, while the sum is 70.

The spelling of 19556241995536 in words is "nineteen trillion, five hundred fifty-six billion, two hundred forty-one million, nine hundred ninety-five thousand, five hundred thirty-six".