1550505010665 has 16 divisors (see below), whose sum is σ = 2671639403328. Its totient is φ = 763325543616.

The previous prime is 1550505010643. The next prime is 1550505010679. The reversal of 1550505010665 is 5660105050551.

It is not a de Polignac number, because 1550505010665 - 2²⁷ = 1550370792937 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 3975653679 + ... + 3975654068.

It is an arithmetic number, because the mean of its divisors is an integer number (166977462708).

Almost surely, 2^{1550505010665} is an apocalyptic number.

1550505010665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1550505010665 is a deficient number, since it is larger than the sum of its proper divisors (1121134392663).

1550505010665 is a wasteful number, since it uses less digits than its factorization.

1550505010665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7951307768.

The product of its (nonzero) digits is 112500, while the sum is 39.

The spelling of 1550505010665 in words is "one trillion, five hundred fifty billion, five hundred five million, ten thousand, six hundred sixty-five".