55185666838 has 4 divisors (see below), whose sum is σ = 82778500260. Its totient is φ = 27592833418.

The previous prime is 55185666827. The next prime is 55185666853. The reversal of 55185666838 is 83866658155.

55185666838 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13796416708 + ... + 13796416711.

It is an arithmetic number, because the mean of its divisors is an integer number (20694625065).

Almost surely, 2^55185666838 is an apocalyptic number.

55185666838 is a deficient number, since it is larger than the sum of its proper divisors (27592833422).

55185666838 is a wasteful number, since it uses less digits than its factorization.

55185666838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27592833421.

The product of its digits is 41472000, while the sum is 61.

The spelling of 55185666838 in words is "fifty-five billion, one hundred eighty-five million, six hundred sixty-six thousand, eight hundred thirty-eight".