55738518 has 16 divisors (see below), whose sum is σ = 121611456. Its totient is φ = 16890440.

The previous prime is 55738517. The next prime is 55738519. The reversal of 55738518 is 81583755.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (55738517) and next prime (55738519).

It is a self number, because there is not a number n which added to its sum of digits gives 55738518.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55738517) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 422196 + ... + 422327.

It is an arithmetic number, because the mean of its divisors is an integer number (7600716).

Almost surely, 2^55738518 is an apocalyptic number.

55738518 is an abundant number, since it is smaller than the sum of its proper divisors (65872938).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55738518 is a wasteful number, since it uses less digits than its factorization.

55738518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 844539.

The product of its digits is 168000, while the sum is 42.

The square root of 55738518 is about 7465.8233303501. The cubic root of 55738518 is about 381.9898346207.

The spelling of 55738518 in words is "fifty-five million, seven hundred thirty-eight thousand, five hundred eighteen".