643120453022 has 4 divisors (see below), whose sum is σ = 964680679536. Its totient is φ = 321560226510.

The previous prime is 643120452991. The next prime is 643120453049. The reversal of 643120453022 is 220354021346.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 643120453022.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160780113254 + ... + 160780113257.

It is an arithmetic number, because the mean of its divisors is an integer number (241170169884).

Almost surely, 2^643120453022 is an apocalyptic number.

643120453022 is a deficient number, since it is larger than the sum of its proper divisors (321560226514).

643120453022 is a wasteful number, since it uses less digits than its factorization.

643120453022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321560226513.

The product of its (nonzero) digits is 34560, while the sum is 32.

Adding to 643120453022 its reverse (220354021346), we get a palindrome (863474474368).

The spelling of 643120453022 in words is "six hundred forty-three billion, one hundred twenty million, four hundred fifty-three thousand, twenty-two".