55538616 has 32 divisors (see below), whose sum is σ = 158682240. Its totient is φ = 15868128.

The previous prime is 55538603. The next prime is 55538617. The reversal of 55538616 is 61683555.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55538617) 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, 165126 + ... + 165461.

It is an arithmetic number, because the mean of its divisors is an integer number (4958820).

Almost surely, 2^55538616 is an apocalyptic number.

55538616 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

55538616 is an abundant number, since it is smaller than the sum of its proper divisors (103143624).

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

55538616 is a wasteful number, since it uses less digits than its factorization.

55538616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330603 (or 330599 counting only the distinct ones).

The product of its digits is 108000, while the sum is 39.

The square root of 55538616 is about 7452.4234984332. The cubic root of 55538616 is about 381.5326283411.

The spelling of 55538616 in words is "fifty-five million, five hundred thirty-eight thousand, six hundred sixteen".