551656306561 has 8 divisors (see below), whose sum is σ = 575963173440. Its totient is φ = 527376257232.

The previous prime is 551656306519. The next prime is 551656306577. The reversal of 551656306561 is 165603656155.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 551656306561 - 2⁹ = 551656306049 is a prime.

It is a super-3 number, since 3×551656306561³ (a number of 36 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (551656306961) 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, 6662335 + ... + 6744628.

It is an arithmetic number, because the mean of its divisors is an integer number (71995396680).

Almost surely, 2^551656306561 is an apocalyptic number.

It is an amenable number.

551656306561 is a deficient number, since it is larger than the sum of its proper divisors (24306866879).

551656306561 is a wasteful number, since it uses less digits than its factorization.

551656306561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13408775.

The product of its (nonzero) digits is 2430000, while the sum is 49.

The spelling of 551656306561 in words is "five hundred fifty-one billion, six hundred fifty-six million, three hundred six thousand, five hundred sixty-one".