55538353685 has 4 divisors (see below), whose sum is σ = 66646024428. Its totient is φ = 44430682944.

The previous prime is 55538353681. The next prime is 55538353687. The reversal of 55538353685 is 58635383555.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 41978682769 + 13559670916 = 204887^2 + 116446^2 .

It is a cyclic number.

It is not a de Polignac number, because 55538353685 - 2² = 55538353681 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55538353685.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55538353681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5553835364 + ... + 5553835373.

It is an arithmetic number, because the mean of its divisors is an integer number (16661506107).

Almost surely, 2^55538353685 is an apocalyptic number.

It is an amenable number.

55538353685 is a deficient number, since it is larger than the sum of its proper divisors (11107670743).

55538353685 is a wasteful number, since it uses less digits than its factorization.

55538353685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11107670742.

The product of its digits is 32400000, while the sum is 56.

The spelling of 55538353685 in words is "fifty-five billion, five hundred thirty-eight million, three hundred fifty-three thousand, six hundred eighty-five".