551116668329 has 4 divisors (see below), whose sum is σ = 551203752660. Its totient is φ = 551029584000.

The previous prime is 551116668317. The next prime is 551116668331. The reversal of 551116668329 is 923866611155.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 923866611155 = 5 ⋅184773322231.

It can be written as a sum of positive squares in 2 ways, for example, as 312531312025 + 238585356304 = 559045^2 + 488452^2 .

It is a cyclic number.

It is not a de Polignac number, because 551116668329 - 2¹² = 551116664233 is a prime.

It is a super-2 number, since 2×551116668329² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (551116668359) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43532672 + ... + 43545329.

It is an arithmetic number, because the mean of its divisors is an integer number (137800938165).

Almost surely, 2^551116668329 is an apocalyptic number.

It is an amenable number.

551116668329 is a deficient number, since it is larger than the sum of its proper divisors (87084331).

551116668329 is an equidigital number, since it uses as much as digits as its factorization.

551116668329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87084330.

The product of its digits is 2332800, while the sum is 53.

The spelling of 551116668329 in words is "five hundred fifty-one billion, one hundred sixteen million, six hundred sixty-eight thousand, three hundred twenty-nine".