55511616 has 56 divisors (see below), whose sum is σ = 154614880. Its totient is φ = 17528832.

The previous prime is 55511611. The next prime is 55511623. The reversal of 55511616 is 61611555.

It is not an unprimeable number, because it can be changed into a prime (55511611) 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, 3961 + ... + 11256.

It is an arithmetic number, because the mean of its divisors is an integer number (2760980).

Almost surely, 2^55511616 is an apocalyptic number.

It is an amenable number.

55511616 is an abundant number, since it is smaller than the sum of its proper divisors (99103264).

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

55511616 is a wasteful number, since it uses less digits than its factorization.

55511616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15251 (or 15241 counting only the distinct ones).

The product of its digits is 4500, while the sum is 30.

The square root of 55511616 is about 7450.6117869609. The cubic root of 55511616 is about 381.4707911817.

The spelling of 55511616 in words is "fifty-five million, five hundred eleven thousand, six hundred sixteen".