1642426106481 has 6 divisors (see below), whose sum is σ = 2372393264930. Its totient is φ = 1094950737648.

The previous prime is 1642426106423. The next prime is 1642426106483. The reversal of 1642426106481 is 1846016242461.

1642426106481 is a `hidden beast` number, since 1 + 6 + 4 + 24 + 2 + 610 + 6 + 4 + 8 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 985095950400 + 657330156081 = 992520^2 + 810759^2 .

It is not a de Polignac number, because 1642426106481 - 2¹¹ = 1642426104433 is a prime.

It is a super-2 number, since 2×1642426106481² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1642426106483) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 91245894796 + ... + 91245894813.

Almost surely, 2^{1642426106481} is an apocalyptic number.

It is an amenable number.

1642426106481 is a deficient number, since it is larger than the sum of its proper divisors (729967158449).

1642426106481 is a wasteful number, since it uses less digits than its factorization.

1642426106481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182491789615 (or 182491789612 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 45.

The spelling of 1642426106481 in words is "one trillion, six hundred forty-two billion, four hundred twenty-six million, one hundred six thousand, four hundred eighty-one".