1550705642 has 8 divisors (see below), whose sum is σ = 2340874596. Its totient is φ = 770414112.

The previous prime is 1550705633. The next prime is 1550705647. The reversal of 1550705642 is 2465070551.

It is a Cunningham number, because it is equal to 39379²+1.

It can be written as a sum of positive squares in 2 ways, for example, as 1550705641 + 1 = 39379^2 + 1^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 2468963 + ... + 2469590.

Almost surely, 2^1550705642 is an apocalyptic number.

1550705642 is a deficient number, since it is larger than the sum of its proper divisors (790168954).

1550705642 is a wasteful number, since it uses less digits than its factorization.

1550705642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4938712.

The product of its (nonzero) digits is 42000, while the sum is 35.

The square root of 1550705642 is about 39379.0000126971. Note that the first 4 decimals coincide. The cubic root of 1550705642 is about 1157.4701211836.

The spelling of 1550705642 in words is "one billion, five hundred fifty million, seven hundred five thousand, six hundred forty-two".