1550705641 has 9 divisors (see below), whose sum is σ = 1582646359. Its totient is φ = 1519399336.

The previous prime is 1550705633. The next prime is 1550705647. The reversal of 1550705641 is 1465070551.

The square root of 1550705641 is 39379.

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., 1117899225 + 432806416 = 33435^2 + 20804^2 .

It is not a de Polignac number, because 1550705641 - 2³ = 1550705633 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1550705597 and 1550705606.

It is not an unprimeable number, because it can be changed into a prime (1550705647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2086716 + ... + 2087458.

Almost surely, 2^1550705641 is an apocalyptic number.

1550705641 is the 39379-th square number.

1550705641 is the 19690-th centered octagonal number.

It is an amenable number.

1550705641 is a deficient number, since it is larger than the sum of its proper divisors (31940718).

1550705641 is an frugal number, since it uses more digits than its factorization.

1550705641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1592 (or 796 counting only the distinct ones).

The product of its (nonzero) digits is 21000, while the sum is 34.

The cubic root of 1550705641 is about 1157.4701209348.

The spelling of 1550705641 in words is "one billion, five hundred fifty million, seven hundred five thousand, six hundred forty-one".