551611561659 has 4 divisors (see below), whose sum is σ = 735482082216. Its totient is φ = 367741041104.

The previous prime is 551611561651. The next prime is 551611561687. The reversal of 551611561659 is 956165116155.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 551611561659 - 2³ = 551611561651 is a prime.

It is not an unprimeable number, because it can be changed into a prime (551611561651) 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, 91935260274 + ... + 91935260279.

It is an arithmetic number, because the mean of its divisors is an integer number (183870520554).

Almost surely, 2^551611561659 is an apocalyptic number.

551611561659 is a deficient number, since it is larger than the sum of its proper divisors (183870520557).

551611561659 is a wasteful number, since it uses less digits than its factorization.

551611561659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183870520556.

The product of its digits is 1215000, while the sum is 51.

The spelling of 551611561659 in words is "five hundred fifty-one billion, six hundred eleven million, five hundred sixty-one thousand, six hundred fifty-nine".