551549817069 has 4 divisors (see below), whose sum is σ = 735399756096. Its totient is φ = 367699878044.

The previous prime is 551549817043. The next prime is 551549817107. The reversal of 551549817069 is 960718945155.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 551549817069 - 2⁵ = 551549817037 is a prime.

It is a super-2 number, since 2×551549817069² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551549817869) 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, 91924969509 + ... + 91924969514.

It is an arithmetic number, because the mean of its divisors is an integer number (183849939024).

Almost surely, 2^551549817069 is an apocalyptic number.

It is an amenable number.

551549817069 is a deficient number, since it is larger than the sum of its proper divisors (183849939027).

551549817069 is a wasteful number, since it uses less digits than its factorization.

551549817069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183849939026.

The product of its (nonzero) digits is 13608000, while the sum is 60.

The spelling of 551549817069 in words is "five hundred fifty-one billion, five hundred forty-nine million, eight hundred seventeen thousand, sixty-nine".