55685529999 has 20 divisors (see below), whose sum is σ = 90746791080. Its totient is φ = 33748805520.

The previous prime is 55685529997. The next prime is 55685530007. The reversal of 55685529999 is 99992558655.

55685529999 is a `hidden beast` number, since 5 + 5 + 6 + 8 + 5 + 529 + 9 + 99 = 666.

It is not a de Polignac number, because 55685529999 - 2¹ = 55685529997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55685529997) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 31248004 + ... + 31249785.

It is an arithmetic number, because the mean of its divisors is an integer number (4537339554).

Almost surely, 2^55685529999 is an apocalyptic number.

55685529999 is a deficient number, since it is larger than the sum of its proper divisors (35061261081).

55685529999 is a wasteful number, since it uses less digits than its factorization.

55685529999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62497812 (or 62497803 counting only the distinct ones).

The product of its digits is 393660000, while the sum is 72.

The spelling of 55685529999 in words is "fifty-five billion, six hundred eighty-five million, five hundred twenty-nine thousand, nine hundred ninety-nine".