55505616 has 20 divisors (see below), whose sum is σ = 143389632. Its totient is φ = 18501856.

The previous prime is 55505609. The next prime is 55505621. The reversal of 55505616 is 61650555.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 578136 + ... + 578231.

Almost surely, 2^55505616 is an apocalyptic number.

It is an amenable number.

55505616 is an abundant number, since it is smaller than the sum of its proper divisors (87884016).

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

55505616 is a wasteful number, since it uses less digits than its factorization.

55505616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1156378 (or 1156372 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 33.

The square root of 55505616 is about 7450.2091245817. The cubic root of 55505616 is about 381.4570468679.

The spelling of 55505616 in words is "fifty-five million, five hundred five thousand, six hundred sixteen".