55727811689 has 4 divisors (see below), whose sum is σ = 60793976400. Its totient is φ = 50661646980.

The previous prime is 55727811683. The next prime is 55727811697. The reversal of 55727811689 is 98611872755.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 55727811689 - 2¹⁶ = 55727746153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55727811683) 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, 2533082339 + ... + 2533082360.

It is an arithmetic number, because the mean of its divisors is an integer number (15198494100).

Almost surely, 2^55727811689 is an apocalyptic number.

It is an amenable number.

55727811689 is a deficient number, since it is larger than the sum of its proper divisors (5066164711).

55727811689 is a wasteful number, since it uses less digits than its factorization.

55727811689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5066164710.

The product of its digits is 8467200, while the sum is 59.

The spelling of 55727811689 in words is "fifty-five billion, seven hundred twenty-seven million, eight hundred eleven thousand, six hundred eighty-nine".