551606516061 has 4 divisors (see below), whose sum is σ = 735475354752. Its totient is φ = 367737677372.

The previous prime is 551606516053. The next prime is 551606516093. The reversal of 551606516061 is 160615606155.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 551606516061 - 2³ = 551606516053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551606511061) 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, 91934419341 + ... + 91934419346.

It is an arithmetic number, because the mean of its divisors is an integer number (183868838688).

Almost surely, 2^551606516061 is an apocalyptic number.

It is an amenable number.

551606516061 is a deficient number, since it is larger than the sum of its proper divisors (183868838691).

551606516061 is a wasteful number, since it uses less digits than its factorization.

551606516061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183868838690.

The product of its (nonzero) digits is 162000, while the sum is 42.

The spelling of 551606516061 in words is "five hundred fifty-one billion, six hundred six million, five hundred sixteen thousand, sixty-one".