1642140444405 has 16 divisors (see below), whose sum is σ = 2635873029504. Its totient is φ = 872992130880.

The previous prime is 1642140444391. The next prime is 1642140444407. The reversal of 1642140444405 is 5044440412461.

It is not a de Polignac number, because 1642140444405 - 2⁴ = 1642140444389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1642140444407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 176001814 + ... + 176011143.

It is an arithmetic number, because the mean of its divisors is an integer number (164742064344).

Almost surely, 2^{1642140444405} is an apocalyptic number.

1642140444405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1642140444405 is a deficient number, since it is larger than the sum of its proper divisors (993732585099).

1642140444405 is a wasteful number, since it uses less digits than its factorization.

1642140444405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352013276.

The product of its (nonzero) digits is 245760, while the sum is 39.

Adding to 1642140444405 its reverse (5044440412461), we get a palindrome (6686580856866).

The spelling of 1642140444405 in words is "one trillion, six hundred forty-two billion, one hundred forty million, four hundred forty-four thousand, four hundred five".