551799691 has 8 divisors (see below), whose sum is σ = 582458000. Its totient is φ = 522751104.

The previous prime is 551799673. The next prime is 551799697. The reversal of 551799691 is 196997155.

551799691 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-551799691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (551799697) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33366 + ... + 47083.

It is an arithmetic number, because the mean of its divisors is an integer number (72807250).

Almost surely, 2^551799691 is an apocalyptic number.

551799691 is a deficient number, since it is larger than the sum of its proper divisors (30658309).

551799691 is an frugal number, since it uses more digits than its factorization.

551799691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80506 (or 80468 counting only the distinct ones).

The product of its digits is 765450, while the sum is 52.

The square root of 551799691 is about 23490.4170035357. The cubic root of 551799691 is about 820.2139492294.

The spelling of 551799691 in words is "five hundred fifty-one million, seven hundred ninety-nine thousand, six hundred ninety-one".