642733333697 has 32 divisors (see below), whose sum is σ = 813035596800. Its totient is φ = 494788492224.

The previous prime is 642733333691. The next prime is 642733333721. The reversal of 642733333697 is 796333337246.

It is not a de Polignac number, because 642733333697 - 2⁴ = 642733333681 is a prime.

It is a super-2 number, since 2×642733333697² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (642733333691) by changing a digit.

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 in 31 ways as a sum of consecutive naturals, for example, 4539704 + ... + 4679142.

It is an arithmetic number, because the mean of its divisors is an integer number (25407362400).

Almost surely, 2^642733333697 is an apocalyptic number.

It is an amenable number.

642733333697 is a deficient number, since it is larger than the sum of its proper divisors (170302263103).

642733333697 is an equidigital number, since it uses as much as digits as its factorization.

642733333697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139570 (or 139496 counting only the distinct ones).

The product of its digits is 30862944, while the sum is 56.

The spelling of 642733333697 in words is "six hundred forty-two billion, seven hundred thirty-three million, three hundred thirty-three thousand, six hundred ninety-seven".