551686194657 has 18 divisors (see below), whose sum is σ = 862893794022. Its totient is φ = 339499195776.

The previous prime is 551686194583. The next prime is 551686194659. The reversal of 551686194657 is 756491686155.

551686194657 is a `hidden beast` number, since 5 + 5 + 1 + 6 + 8 + 619 + 4 + 6 + 5 + 7 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 45640340496 + 506045854161 = 213636^2 + 711369^2 .

It is not a de Polignac number, because 551686194657 - 2¹⁵ = 551686161889 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 551686194594 and 551686194603.

It is not an unprimeable number, because it can be changed into a prime (551686194659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 181354888 + ... + 181357929.

Almost surely, 2^551686194657 is an apocalyptic number.

It is an amenable number.

551686194657 is a deficient number, since it is larger than the sum of its proper divisors (311207599365).

551686194657 is a wasteful number, since it uses less digits than its factorization.

551686194657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362712849 (or 362712833 counting only the distinct ones).

The product of its digits is 54432000, while the sum is 63.

The spelling of 551686194657 in words is "five hundred fifty-one billion, six hundred eighty-six million, one hundred ninety-four thousand, six hundred fifty-seven".