642471233653 has 8 divisors (see below), whose sum is σ = 680271747840. Its totient is φ = 604671618240.

The previous prime is 642471233641. The next prime is 642471233681. The reversal of 642471233653 is 356332174246.

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

It is a de Polignac number, because none of the positive numbers 2^k-642471233653 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 (642471233603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1735858 + ... + 2073196.

It is an arithmetic number, because the mean of its divisors is an integer number (85033968480).

Almost surely, 2^642471233653 is an apocalyptic number.

It is an amenable number.

642471233653 is a deficient number, since it is larger than the sum of its proper divisors (37800514187).

642471233653 is a wasteful number, since it uses less digits than its factorization.

642471233653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449387.

The product of its digits is 2177280, while the sum is 46.

The spelling of 642471233653 in words is "six hundred forty-two billion, four hundred seventy-one million, two hundred thirty-three thousand, six hundred fifty-three".