642082055 has 4 divisors (see below), whose sum is σ = 770498472. Its totient is φ = 513665640.

The previous prime is 642082043. The next prime is 642082093. The reversal of 642082055 is 550280246.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 642082055 - 2⁸ = 642081799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64208201 + ... + 64208210.

It is an arithmetic number, because the mean of its divisors is an integer number (192624618).

Almost surely, 2^642082055 is an apocalyptic number.

642082055 is a deficient number, since it is larger than the sum of its proper divisors (128416417).

642082055 is a wasteful number, since it uses less digits than its factorization.

642082055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128416416.

The product of its (nonzero) digits is 19200, while the sum is 32.

The square root of 642082055 is about 25339.3380931705. The cubic root of 642082055 is about 862.7073751865.

The spelling of 642082055 in words is "six hundred forty-two million, eighty-two thousand, fifty-five".