55471680 has 336 divisors, whose sum is σ = 222528384. Its totient is φ = 12533760.

The previous prime is 55471649. The next prime is 55471687. The reversal of 55471680 is 8617455.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (55471687) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 538509 + ... + 538611.

Almost surely, 2^55471680 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55471680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111264192).

55471680 is an abundant number, since it is smaller than the sum of its proper divisors (167056704).

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

55471680 is a wasteful number, since it uses less digits than its factorization.

55471680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154 (or 141 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The square root of 55471680 is about 7447.9312563960. The cubic root of 55471680 is about 381.3792903789.

It can be divided in two parts, 5547 and 1680, that added together give a palindrome (7227).

The spelling of 55471680 in words is "fifty-five million, four hundred seventy-one thousand, six hundred eighty".