551605106065 has 8 divisors (see below), whose sum is σ = 712843521768. Its totient is φ = 407339155200.

The previous prime is 551605106057. The next prime is 551605106093. The reversal of 551605106065 is 560601506155.

It can be written as a sum of positive squares in 4 ways, for example, as 15084015489 + 536521090576 = 122817^2 + 732476^2 .

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

It is not a de Polignac number, because 551605106065 - 2³ = 551605106057 is a prime.

It is a Duffinian number.

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 7 ways as a sum of consecutive naturals, for example, 4243116136 + ... + 4243116265.

It is an arithmetic number, because the mean of its divisors is an integer number (89105440221).

Almost surely, 2^551605106065 is an apocalyptic number.

It is an amenable number.

551605106065 is a deficient number, since it is larger than the sum of its proper divisors (161238415703).

551605106065 is a wasteful number, since it uses less digits than its factorization.

551605106065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8486232419.

The product of its (nonzero) digits is 135000, while the sum is 40.

The spelling of 551605106065 in words is "five hundred fifty-one billion, six hundred five million, one hundred six thousand, sixty-five".