55656677839 has 4 divisors (see below), whose sum is σ = 63607631824. Its totient is φ = 47705723856.

The previous prime is 55656677837. The next prime is 55656677863. The reversal of 55656677839 is 93877665655.

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

It is not a de Polignac number, because 55656677839 - 2¹ = 55656677837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55656677833) 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, 3975476982 + ... + 3975476995.

It is an arithmetic number, because the mean of its divisors is an integer number (15901907956).

Almost surely, 2^55656677839 is an apocalyptic number.

55656677839 is a deficient number, since it is larger than the sum of its proper divisors (7950953985).

55656677839 is an equidigital number, since it uses as much as digits as its factorization.

55656677839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7950953984.

The product of its digits is 285768000, while the sum is 67.

The spelling of 55656677839 in words is "fifty-five billion, six hundred fifty-six million, six hundred seventy-seven thousand, eight hundred thirty-nine".