55646540 has 24 divisors (see below), whose sum is σ = 117037872. Its totient is φ = 22224320.

The previous prime is 55646537. The next prime is 55646551. The reversal of 55646540 is 4564655.

It is a self number, because there is not a number n which added to its sum of digits gives 55646540.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14195 + ... + 17685.

It is an arithmetic number, because the mean of its divisors is an integer number (4876578).

Almost surely, 2^55646540 is an apocalyptic number.

It is an amenable number.

55646540 is an abundant number, since it is smaller than the sum of its proper divisors (61391332).

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

55646540 is a wasteful number, since it uses less digits than its factorization.

55646540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4297 (or 4295 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 35.

The square root of 55646540 is about 7459.6608501996. The cubic root of 55646540 is about 381.7796029529.

The spelling of 55646540 in words is "fifty-five million, six hundred forty-six thousand, five hundred forty".