551704665789 has 12 divisors (see below), whose sum is σ = 797919337696. Its totient is φ = 367335757512.

The previous prime is 551704665779. The next prime is 551704665859. The reversal of 551704665789 is 987566407155.

551704665789 is a `hidden beast` number, since 5 + 5 + 17 + 0 + 46 + 6 + 578 + 9 = 666.

It is not a de Polignac number, because 551704665789 - 2⁷ = 551704665661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551704665739) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38938609 + ... + 38952774.

Almost surely, 2^551704665789 is an apocalyptic number.

It is an amenable number.

551704665789 is a deficient number, since it is larger than the sum of its proper divisors (246214671907).

551704665789 is a wasteful number, since it uses less digits than its factorization.

551704665789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77892176 (or 77892173 counting only the distinct ones).

The product of its (nonzero) digits is 63504000, while the sum is 63.

The spelling of 551704665789 in words is "five hundred fifty-one billion, seven hundred four million, six hundred sixty-five thousand, seven hundred eighty-nine".