551123785585 has 4 divisors (see below), whose sum is σ = 661348542708. Its totient is φ = 440899028464.

The previous prime is 551123785579. The next prime is 551123785603. The reversal of 551123785585 is 585587321155.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 270948357729 + 280175427856 = 520527^2 + 529316^2 .

It is a cyclic number.

It is not a de Polignac number, because 551123785585 - 2²⁷ = 550989567857 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55112378554 + ... + 55112378563.

It is an arithmetic number, because the mean of its divisors is an integer number (165337135677).

Almost surely, 2^551123785585 is an apocalyptic number.

It is an amenable number.

551123785585 is a deficient number, since it is larger than the sum of its proper divisors (110224757123).

551123785585 is a wasteful number, since it uses less digits than its factorization.

551123785585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110224757122.

The product of its digits is 8400000, while the sum is 55.

The spelling of 551123785585 in words is "five hundred fifty-one billion, one hundred twenty-three million, seven hundred eighty-five thousand, five hundred eighty-five".