6642642653453 has 8 divisors (see below), whose sum is σ = 6652870575360. Its totient is φ = 6632418667680.

The previous prime is 6642642653447. The next prime is 6642642653461. The reversal of 6642642653453 is 3543562462466.

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

It is a cyclic number.

It is not a de Polignac number, because 6642642653453 - 2¹⁴ = 6642642637069 is a prime.

It is a super-2 number, since 2×6642642653453² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6642644653453) 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, 2402738 + ... + 4365596.

It is an arithmetic number, because the mean of its divisors is an integer number (831608821920).

Almost surely, 2^{6642642653453} is an apocalyptic number.

It is an amenable number.

6642642653453 is a deficient number, since it is larger than the sum of its proper divisors (10227921907).

6642642653453 is a wasteful number, since it uses less digits than its factorization.

6642642653453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1968067.

The product of its digits is 74649600, while the sum is 56.

The spelling of 6642642653453 in words is "six trillion, six hundred forty-two billion, six hundred forty-two million, six hundred fifty-three thousand, four hundred fifty-three".