1601720424404 has 6 divisors (see below), whose sum is σ = 2803010742714. Its totient is φ = 800860212200.

The previous prime is 1601720424401. The next prime is 1601720424413. The reversal of 1601720424404 is 4044240271061.

It can be written as a sum of positive squares in only one way, i.e., 808017614404 + 793702810000 = 898898^2 + 890900^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1601720424401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200215053047 + ... + 200215053054.

It is an arithmetic number, because the mean of its divisors is an integer number (467168457119).

Almost surely, 2^{1601720424404} is an apocalyptic number.

It is an amenable number.

1601720424404 is a deficient number, since it is larger than the sum of its proper divisors (1201290318310).

1601720424404 is a wasteful number, since it uses less digits than its factorization.

1601720424404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400430106105 (or 400430106103 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 35.

Adding to 1601720424404 its reverse (4044240271061), we get a palindrome (5645960695465).

The spelling of 1601720424404 in words is "one trillion, six hundred one billion, seven hundred twenty million, four hundred twenty-four thousand, four hundred four".