55144766 has 4 divisors (see below), whose sum is σ = 82717152. Its totient is φ = 27572382.

The previous prime is 55144741. The next prime is 55144769. The reversal of 55144766 is 66744155.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66744155 = 5 ⋅13348831.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55144769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13786190 + ... + 13786193.

It is an arithmetic number, because the mean of its divisors is an integer number (20679288).

Almost surely, 2^55144766 is an apocalyptic number.

55144766 is a deficient number, since it is larger than the sum of its proper divisors (27572386).

55144766 is a wasteful number, since it uses less digits than its factorization.

55144766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27572385.

The product of its digits is 100800, while the sum is 38.

The square root of 55144766 is about 7425.9521948367. The cubic root of 55144766 is about 380.6286132855.

The spelling of 55144766 in words is "fifty-five million, one hundred forty-four thousand, seven hundred sixty-six".