55575980 has 12 divisors (see below), whose sum is σ = 116709600. Its totient is φ = 22230384.

The previous prime is 55575979. The next prime is 55575997. The reversal of 55575980 is 8957555.

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, 1389380 + ... + 1389419.

It is an arithmetic number, because the mean of its divisors is an integer number (9725800).

Almost surely, 2^55575980 is an apocalyptic number.

It is an amenable number.

55575980 is an abundant number, since it is smaller than the sum of its proper divisors (61133620).

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

55575980 is a wasteful number, since it uses less digits than its factorization.

55575980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2778808 (or 2778806 counting only the distinct ones).

The product of its (nonzero) digits is 315000, while the sum is 44.

The square root of 55575980 is about 7454.9299124807. The cubic root of 55575980 is about 381.6181687602.

The spelling of 55575980 in words is "fifty-five million, five hundred seventy-five thousand, nine hundred eighty".