1642320106111 has 4 divisors (see below), whose sum is σ = 1643586352672. Its totient is φ = 1641053859552.

The previous prime is 1642320106081. The next prime is 1642320106127. The reversal of 1642320106111 is 1116010232461.

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

It is a cyclic number.

It is not a de Polignac number, because 1642320106111 - 2¹³ = 1642320097919 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1642320106111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1642320103111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 633121335 + ... + 633123928.

It is an arithmetic number, because the mean of its divisors is an integer number (410896588168).

Almost surely, 2^{1642320106111} is an apocalyptic number.

1642320106111 is a deficient number, since it is larger than the sum of its proper divisors (1266246561).

1642320106111 is a wasteful number, since it uses less digits than its factorization.

1642320106111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1266246560.

The product of its (nonzero) digits is 1728, while the sum is 28.

Adding to 1642320106111 its reverse (1116010232461), we get a palindrome (2758330338572).

The spelling of 1642320106111 in words is "one trillion, six hundred forty-two billion, three hundred twenty million, one hundred six thousand, one hundred eleven".