642684274327 has 4 divisors (see below), whose sum is σ = 648580460440. Its totient is φ = 636788088216.

The previous prime is 642684274313. The next prime is 642684274357. The reversal of 642684274327 is 723472486246.

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

It is a cyclic number.

It is not a de Polignac number, because 642684274327 - 2³⁹ = 92928460439 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642684274357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2948092893 + ... + 2948093110.

It is an arithmetic number, because the mean of its divisors is an integer number (162145115110).

Almost surely, 2^642684274327 is an apocalyptic number.

642684274327 is a deficient number, since it is larger than the sum of its proper divisors (5896186113).

642684274327 is a wasteful number, since it uses less digits than its factorization.

642684274327 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5896186112.

The product of its digits is 21676032, while the sum is 55.

The spelling of 642684274327 in words is "six hundred forty-two billion, six hundred eighty-four million, two hundred seventy-four thousand, three hundred twenty-seven".