1550655515109 has 4 divisors (see below), whose sum is σ = 2067540686816. Its totient is φ = 1033770343404.

The previous prime is 1550655515093. The next prime is 1550655515111. The reversal of 1550655515109 is 9015155560551.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1550655515109 - 2⁴ = 1550655515093 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1550655515909) 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, 258442585849 + ... + 258442585854.

It is an arithmetic number, because the mean of its divisors is an integer number (516885171704).

Almost surely, 2^{1550655515109} is an apocalyptic number.

It is an amenable number.

1550655515109 is a deficient number, since it is larger than the sum of its proper divisors (516885171707).

1550655515109 is an equidigital number, since it uses as much as digits as its factorization.

1550655515109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 516885171706.

The product of its (nonzero) digits is 843750, while the sum is 48.

The spelling of 1550655515109 in words is "one trillion, five hundred fifty billion, six hundred fifty-five million, five hundred fifteen thousand, one hundred nine".