55481976 has 128 divisors (see below), whose sum is σ = 177120000. Its totient is φ = 15914880.

The previous prime is 55481947. The next prime is 55482013. The reversal of 55481976 is 67918455.

55481976 is a `hidden beast` number, since 554 + 8 + 1 + 97 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44530 + ... + 45758.

It is an arithmetic number, because the mean of its divisors is an integer number (1383750).

Almost surely, 2^55481976 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 55481976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88560000).

55481976 is an abundant number, since it is smaller than the sum of its proper divisors (121638024).

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

55481976 is a wasteful number, since it uses less digits than its factorization.

55481976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1274 (or 1264 counting only the distinct ones).

The product of its digits is 302400, while the sum is 45.

The square root of 55481976 is about 7448.6224229719. The cubic root of 55481976 is about 381.4028846301.

The spelling of 55481976 in words is "fifty-five million, four hundred eighty-one thousand, nine hundred seventy-six".