55575580 has 12 divisors (see below), whose sum is σ = 116708760. Its totient is φ = 22230224.

The previous prime is 55575563. The next prime is 55575587. The reversal of 55575580 is 8557555.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55575587) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1389370 + ... + 1389409.

It is an arithmetic number, because the mean of its divisors is an integer number (9725730).

Almost surely, 2^55575580 is an apocalyptic number.

It is an amenable number.

55575580 is an abundant number, since it is smaller than the sum of its proper divisors (61133180).

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

55575580 is a wasteful number, since it uses less digits than its factorization.

55575580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2778788 (or 2778786 counting only the distinct ones).

The product of its (nonzero) digits is 175000, while the sum is 40.

The square root of 55575580 is about 7454.9030845478. The cubic root of 55575580 is about 381.6172532110.

The spelling of 55575580 in words is "fifty-five million, five hundred seventy-five thousand, five hundred eighty".