642633343505 has 8 divisors (see below), whose sum is σ = 796036141824. Its totient is φ = 497522588400.

The previous prime is 642633343501. The next prime is 642633343529. The reversal of 642633343505 is 505343336246.

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

It is not a de Polignac number, because 642633343505 - 2² = 642633343501 is a prime.

It is a super-2 number, since 2×642633343505² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (642633343501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2073010631 + ... + 2073010940.

It is an arithmetic number, because the mean of its divisors is an integer number (99504517728).

Almost surely, 2^642633343505 is an apocalyptic number.

It is an amenable number.

642633343505 is a deficient number, since it is larger than the sum of its proper divisors (153402798319).

642633343505 is a wasteful number, since it uses less digits than its factorization.

642633343505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4146021607.

The product of its (nonzero) digits is 2332800, while the sum is 44.

The spelling of 642633343505 in words is "six hundred forty-two billion, six hundred thirty-three million, three hundred forty-three thousand, five hundred five".