642066451153 has 4 divisors (see below), whose sum is σ = 646318547008. Its totient is φ = 637814355300.

The previous prime is 642066451127. The next prime is 642066451177. The reversal of 642066451153 is 351154660246.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 642066451153 - 2⁵ = 642066451121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (642066451183) 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 3 ways as a sum of consecutive naturals, for example, 2126047701 + ... + 2126048002.

It is an arithmetic number, because the mean of its divisors is an integer number (161579636752).

Almost surely, 2^642066451153 is an apocalyptic number.

It is an amenable number.

642066451153 is a deficient number, since it is larger than the sum of its proper divisors (4252095855).

642066451153 is a wasteful number, since it uses less digits than its factorization.

642066451153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4252095854.

The product of its (nonzero) digits is 518400, while the sum is 43.

The spelling of 642066451153 in words is "six hundred forty-two billion, sixty-six million, four hundred fifty-one thousand, one hundred fifty-three".