551979659 has 24 divisors (see below), whose sum is σ = 737352000. Its totient is φ = 407468880.

The previous prime is 551979643. The next prime is 551979671. The reversal of 551979659 is 956979155.

It is a happy number.

It is not a de Polignac number, because 551979659 - 2⁴ = 551979643 is a prime.

It is not an unprimeable number, because it can be changed into a prime (551979629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16709 + ... + 37190.

It is an arithmetic number, because the mean of its divisors is an integer number (30723000).

Almost surely, 2^551979659 is an apocalyptic number.

551979659 is a deficient number, since it is larger than the sum of its proper divisors (185372341).

551979659 is a wasteful number, since it uses less digits than its factorization.

551979659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53943 (or 53936 counting only the distinct ones).

The product of its digits is 3827250, while the sum is 56.

The square root of 551979659 is about 23494.2473597262. The cubic root of 551979659 is about 820.3031097355.

The spelling of 551979659 in words is "five hundred fifty-one million, nine hundred seventy-nine thousand, six hundred fifty-nine".