642678259882 has 8 divisors (see below), whose sum is σ = 964022605056. Its totient is φ = 321337391532.

The previous prime is 642678259841. The next prime is 642678259907. The reversal of 642678259882 is 288952876246.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 343498 + ... + 1184629.

It is an arithmetic number, because the mean of its divisors is an integer number (120502825632).

Almost surely, 2^642678259882 is an apocalyptic number.

642678259882 is a deficient number, since it is larger than the sum of its proper divisors (321344345174).

642678259882 is a wasteful number, since it uses less digits than its factorization.

642678259882 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1738412.

The product of its digits is 185794560, while the sum is 67.

The spelling of 642678259882 in words is "six hundred forty-two billion, six hundred seventy-eight million, two hundred fifty-nine thousand, eight hundred eighty-two".