999606346551 has 24 divisors (see below), whose sum is σ = 1446582646080. Its totient is φ = 665155362816.

The previous prime is 999606346481. The next prime is 999606346573. The reversal of 999606346551 is 155643606999.

999606346551 is a `hidden beast` number, since 9 + 9 + 9 + 60 + 63 + 465 + 51 = 666.

It is not a de Polignac number, because 999606346551 - 2²⁶ = 999539237687 is a prime.

It is a super-3 number, since 3×999606346551³ (a number of 37 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999606346451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34830930 + ... + 34859616.

It is an arithmetic number, because the mean of its divisors is an integer number (60274276920).

Almost surely, 2^999606346551 is an apocalyptic number.

999606346551 is a deficient number, since it is larger than the sum of its proper divisors (446976299529).

999606346551 is a wasteful number, since it uses less digits than its factorization.

With its successor (999606346552) it forms a Ruth-Aaron pair, since the sum of their distinct prime factors is the same (35812).

With its successor (999606346552) it forms an eRAP, since the sums of their prime factors are consecutive (35815 and 35816).

999606346551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35815 (or 35812 counting only the distinct ones).

The product of its (nonzero) digits is 47239200, while the sum is 63.

The spelling of 999606346551 in words is "nine hundred ninety-nine billion, six hundred six million, three hundred forty-six thousand, five hundred fifty-one".