643402114453 has 24 divisors (see below), whose sum is σ = 766124739072. Its totient is φ = 538471188864.

The previous prime is 643402114441. The next prime is 643402114483. The reversal of 643402114453 is 354411204346.

It is a de Polignac number, because none of the positive numbers 2^k-643402114453 is a prime.

It is a super-2 number, since 2×643402114453² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643402114483) 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 23 ways as a sum of consecutive naturals, for example, 6051276 + ... + 6156682.

It is an arithmetic number, because the mean of its divisors is an integer number (31921864128).

Almost surely, 2^643402114453 is an apocalyptic number.

It is an amenable number.

643402114453 is a deficient number, since it is larger than the sum of its proper divisors (122722624619).

643402114453 is a wasteful number, since it uses less digits than its factorization.

643402114453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108361 (or 108354 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 37.

Adding to 643402114453 its reverse (354411204346), we get a palindrome (997813318799).

The spelling of 643402114453 in words is "six hundred forty-three billion, four hundred two million, one hundred fourteen thousand, four hundred fifty-three".