1605634501113 has 6 divisors (see below), whose sum is σ = 2319249834954. Its totient is φ = 1070423000736.

The previous prime is 1605634501103. The next prime is 1605634501129. The reversal of 1605634501113 is 3111054365061.

1605634501113 is a `hidden beast` number, since 1 + 6 + 0 + 5 + 6 + 34 + 501 + 113 = 666.

It can be written as a sum of positive squares in only one way, i.e., 981995775849 + 623638725264 = 990957^2 + 789708^2 .

It is not a de Polignac number, because 1605634501113 - 2⁸ = 1605634500857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1605634501103) 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, 89201916720 + ... + 89201916737.

It is an arithmetic number, because the mean of its divisors is an integer number (386541639159).

Almost surely, 2^{1605634501113} is an apocalyptic number.

It is an amenable number.

1605634501113 is a deficient number, since it is larger than the sum of its proper divisors (713615333841).

1605634501113 is a wasteful number, since it uses less digits than its factorization.

1605634501113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178403833463 (or 178403833460 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

Adding to 1605634501113 its reverse (3111054365061), we get a palindrome (4716688866174).

The spelling of 1605634501113 in words is "one trillion, six hundred five billion, six hundred thirty-four million, five hundred one thousand, one hundred thirteen".