642273864662 has 4 divisors (see below), whose sum is σ = 963410796996. Its totient is φ = 321136932330.

The previous prime is 642273864649. The next prime is 642273864721. The reversal of 642273864662 is 266468372246.

It is a happy number.

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

It is a super-3 number, since 3×642273864662³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 642273864598 and 642273864607.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160568466164 + ... + 160568466167.

It is an arithmetic number, because the mean of its divisors is an integer number (240852699249).

Almost surely, 2^642273864662 is an apocalyptic number.

642273864662 is a deficient number, since it is larger than the sum of its proper divisors (321136932334).

642273864662 is a wasteful number, since it uses less digits than its factorization.

642273864662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321136932333.

The product of its digits is 27869184, while the sum is 56.

The spelling of 642273864662 in words is "six hundred forty-two billion, two hundred seventy-three million, eight hundred sixty-four thousand, six hundred sixty-two".