54185618 has 4 divisors (see below), whose sum is σ = 81278430. Its totient is φ = 27092808.

The previous prime is 54185617. The next prime is 54185657. The reversal of 54185618 is 81658145.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81658145 = 5 ⋅16331629.

It can be written as a sum of positive squares in only one way, i.e., 27384289 + 26801329 = 5233^2 + 5177^2 .

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (54185611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13546403 + ... + 13546406.

Almost surely, 2^54185618 is an apocalyptic number.

54185618 is a deficient number, since it is larger than the sum of its proper divisors (27092812).

54185618 is a wasteful number, since it uses less digits than its factorization.

54185618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27092811.

The product of its digits is 38400, while the sum is 38.

The square root of 54185618 is about 7361.0880989158. The cubic root of 54185618 is about 378.4089012220.

The spelling of 54185618 in words is "fifty-four million, one hundred eighty-five thousand, six hundred eighteen".