54018639 has 24 divisors (see below), whose sum is σ = 83566080. Its totient is φ = 33504768.

The previous prime is 54018637. The next prime is 54018661. The reversal of 54018639 is 93681045.

54018639 is a `hidden beast` number, since 5 + 4 + 0 + 18 + 639 = 666.

It is not a de Polignac number, because 54018639 - 2¹ = 54018637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54018637) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11634 + ... + 15600.

It is an arithmetic number, because the mean of its divisors is an integer number (3481920).

Almost surely, 2^54018639 is an apocalyptic number.

54018639 is a deficient number, since it is larger than the sum of its proper divisors (29547441).

54018639 is a wasteful number, since it uses less digits than its factorization.

54018639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4079 (or 4076 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 54018639 is about 7349.7373422456. The cubic root of 54018639 is about 378.0197982408.

It can be divided in two parts, 540186 and 39, that added together give a square (540225 = 735²).

The spelling of 54018639 in words is "fifty-four million, eighteen thousand, six hundred thirty-nine".