55122661774 has 4 divisors (see below), whose sum is σ = 82683992664. Its totient is φ = 27561330886.

The previous prime is 55122661771. The next prime is 55122661801. The reversal of 55122661774 is 47716622155.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 47716622155 = 5 ⋅9543324431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55122661771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13780665442 + ... + 13780665445.

It is an arithmetic number, because the mean of its divisors is an integer number (20670998166).

Almost surely, 2^55122661774 is an apocalyptic number.

55122661774 is a deficient number, since it is larger than the sum of its proper divisors (27561330890).

55122661774 is a wasteful number, since it uses less digits than its factorization.

55122661774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27561330889.

The product of its digits is 705600, while the sum is 46.

The spelling of 55122661774 in words is "fifty-five billion, one hundred twenty-two million, six hundred sixty-one thousand, seven hundred seventy-four".