55671616 has 168 divisors, whose sum is σ = 151343360. Its totient is φ = 19768320.

The previous prime is 55671613. The next prime is 55671673. The reversal of 55671616 is 61617655.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55671611) 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, 704665 + ... + 704743.

Almost surely, 2^55671616 is an apocalyptic number.

55671616 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55671616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75671680).

55671616 is an abundant number, since it is smaller than the sum of its proper divisors (95671744).

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

55671616 is a wasteful number, since it uses less digits than its factorization.

55671616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133 (or 112 counting only the distinct ones).

The product of its digits is 37800, while the sum is 37.

The square root of 55671616 is about 7461.3414343535. The cubic root of 55671616 is about 381.8369414544.

The spelling of 55671616 in words is "fifty-five million, six hundred seventy-one thousand, six hundred sixteen".