55755707985 has 24 divisors (see below), whose sum is σ = 97498485864. Its totient is φ = 29473221120.

The previous prime is 55755707957. The next prime is 55755707989. The reversal of 55755707985 is 58970755755.

55755707985 is a `hidden beast` number, since 5 + 5 + 7 + 557 + 0 + 79 + 8 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 244578321 + 55511129664 = 15639^2 + 235608^2 .

It is not a de Polignac number, because 55755707985 - 2¹⁰ = 55755706961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55755707989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5477286 + ... + 5487455.

It is an arithmetic number, because the mean of its divisors is an integer number (4062436911).

Almost surely, 2^55755707985 is an apocalyptic number.

It is an amenable number.

55755707985 is a deficient number, since it is larger than the sum of its proper divisors (41742777879).

55755707985 is a wasteful number, since it uses less digits than its factorization.

55755707985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10964865 (or 10964862 counting only the distinct ones).

The product of its (nonzero) digits is 77175000, while the sum is 63.

The spelling of 55755707985 in words is "fifty-five billion, seven hundred fifty-five million, seven hundred seven thousand, nine hundred eighty-five".