13605561401242 has 32 divisors (see below), whose sum is σ = 21226037144400. Its totient is φ = 6532762779648.

The previous prime is 13605561401221. The next prime is 13605561401249. The reversal of 13605561401242 is 24210416550631.

It can be written as a sum of positive squares in 8 ways, for example, as 7101264361 + 13598460136881 = 84269^2 + 3687609^2 .

It is a super-2 number, since 2×13605561401242² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13605561401195 and 13605561401204.

It is not an unprimeable number, because it can be changed into a prime (13605561401249) 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, 52807918 + ... + 53064934.

Almost surely, 2^{13605561401242} is an apocalyptic number.

13605561401242 is a deficient number, since it is larger than the sum of its proper divisors (7620475743158).

13605561401242 is a wasteful number, since it uses less digits than its factorization.

13605561401242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261970.

The product of its (nonzero) digits is 172800, while the sum is 40.

Adding to 13605561401242 its reverse (24210416550631), we get a palindrome (37815977951873).

The spelling of 13605561401242 in words is "thirteen trillion, six hundred five billion, five hundred sixty-one million, four hundred one thousand, two hundred forty-two".