55740642 has 64 divisors (see below), whose sum is σ = 122411520. Its totient is φ = 16861824.

The previous prime is 55740589. The next prime is 55740673. The reversal of 55740642 is 24604755.

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 31 ways as a sum of consecutive naturals, for example, 406798 + ... + 406934.

It is an arithmetic number, because the mean of its divisors is an integer number (1912680).

Almost surely, 2^55740642 is an apocalyptic number.

55740642 is an abundant number, since it is smaller than the sum of its proper divisors (66670878).

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

55740642 is a wasteful number, since it uses less digits than its factorization.

55740642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287.

The product of its (nonzero) digits is 33600, while the sum is 33.

The square root of 55740642 is about 7465.9655772043. The cubic root of 55740642 is about 381.9946866580.

The spelling of 55740642 in words is "fifty-five million, seven hundred forty thousand, six hundred forty-two".